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android / platform / frameworks / base / 63777c0ca8e1 / . / services / core / java / com / android / server / pm / permission / PermissionManagerService.java
blob: 7b12709e4efd37a32397305b2314b56835e72bbd [file] [log] [blame]
/*
* Copyright (C) 2017 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.server.pm.permission;
import static android.Manifest.permission.ADJUST_RUNTIME_PERMISSIONS_POLICY;
import static android.Manifest.permission.CAPTURE_AUDIO_HOTWORD;
import static android.Manifest.permission.READ_EXTERNAL_STORAGE;
import static android.Manifest.permission.RECORD_AUDIO;
import static android.Manifest.permission.UPDATE_APP_OPS_STATS;
import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
import static android.app.AppOpsManager.ATTRIBUTION_CHAIN_ID_NONE;
import static android.app.AppOpsManager.ATTRIBUTION_FLAGS_NONE;
import static android.app.AppOpsManager.MODE_ALLOWED;
import static android.app.AppOpsManager.MODE_ERRORED;
import static android.app.AppOpsManager.MODE_IGNORED;
import static android.content.pm.ApplicationInfo.AUTO_REVOKE_DISALLOWED;
import static android.content.pm.ApplicationInfo.AUTO_REVOKE_DISCOURAGED;
import static android.content.pm.PackageManager.FLAGS_PERMISSION_RESTRICTION_ANY_EXEMPT;
import static android.content.pm.PackageManager.FLAG_PERMISSION_APPLY_RESTRICTION;
import static android.content.pm.PackageManager.FLAG_PERMISSION_GRANTED_BY_DEFAULT;
import static android.content.pm.PackageManager.FLAG_PERMISSION_GRANTED_BY_ROLE;
import static android.content.pm.PackageManager.FLAG_PERMISSION_ONE_TIME;
import static android.content.pm.PackageManager.FLAG_PERMISSION_POLICY_FIXED;
import static android.content.pm.PackageManager.FLAG_PERMISSION_RESTRICTION_INSTALLER_EXEMPT;
import static android.content.pm.PackageManager.FLAG_PERMISSION_RESTRICTION_SYSTEM_EXEMPT;
import static android.content.pm.PackageManager.FLAG_PERMISSION_RESTRICTION_UPGRADE_EXEMPT;
import static android.content.pm.PackageManager.FLAG_PERMISSION_REVIEW_REQUIRED;
import static android.content.pm.PackageManager.FLAG_PERMISSION_REVOKED_COMPAT;
import static android.content.pm.PackageManager.FLAG_PERMISSION_REVOKE_WHEN_REQUESTED;
import static android.content.pm.PackageManager.FLAG_PERMISSION_SELECTED_LOCATION_ACCURACY;
import static android.content.pm.PackageManager.FLAG_PERMISSION_SYSTEM_FIXED;
import static android.content.pm.PackageManager.FLAG_PERMISSION_USER_FIXED;
import static android.content.pm.PackageManager.FLAG_PERMISSION_USER_SET;
import static android.content.pm.PackageManager.FLAG_PERMISSION_WHITELIST_INSTALLER;
import static android.content.pm.PackageManager.FLAG_PERMISSION_WHITELIST_SYSTEM;
import static android.content.pm.PackageManager.FLAG_PERMISSION_WHITELIST_UPGRADE;
import static android.content.pm.PackageManager.MASK_PERMISSION_FLAGS_ALL;
import static android.content.pm.PackageManager.MATCH_DEBUG_TRIAGED_MISSING;
import static android.os.Trace.TRACE_TAG_PACKAGE_MANAGER;
import static android.permission.PermissionManager.KILL_APP_REASON_GIDS_CHANGED;
import static android.permission.PermissionManager.KILL_APP_REASON_PERMISSIONS_REVOKED;
import static com.android.server.pm.ApexManager.MATCH_ACTIVE_PACKAGE;
import static com.android.server.pm.PackageManagerService.DEBUG_INSTALL;
import static com.android.server.pm.PackageManagerService.DEBUG_PACKAGE_SCANNING;
import static com.android.server.pm.PackageManagerService.DEBUG_PERMISSIONS;
import static com.android.server.pm.PackageManagerService.DEBUG_REMOVE;
import static com.android.server.pm.PackageManagerService.PLATFORM_PACKAGE_NAME;
import static java.util.concurrent.TimeUnit.SECONDS;
import android.Manifest;
import android.annotation.AppIdInt;
import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.UserIdInt;
import android.app.ActivityManager;
import android.app.AppOpsManager;
import android.app.AppOpsManager.AttributionFlags;
import android.app.IActivityManager;
import android.app.admin.DevicePolicyManagerInternal;
import android.compat.annotation.ChangeId;
import android.compat.annotation.EnabledAfter;
import android.content.AttributionSource;
import android.content.AttributionSourceState;
import android.content.Context;
import android.content.PermissionChecker;
import android.content.pm.ApplicationInfo;
import android.content.pm.FeatureInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.PermissionGroupInfoFlags;
import android.content.pm.PackageManager.PermissionInfoFlags;
import android.content.pm.PackageManager.PermissionWhitelistFlags;
import android.content.pm.PackageManagerInternal;
import android.content.pm.PackageParser;
import android.content.pm.ParceledListSlice;
import android.content.pm.PermissionGroupInfo;
import android.content.pm.PermissionInfo;
import android.content.pm.parsing.component.ParsedPermission;
import android.content.pm.parsing.component.ParsedPermissionGroup;
import android.content.pm.permission.SplitPermissionInfoParcelable;
import android.metrics.LogMaker;
import android.os.AsyncTask;
import android.os.Binder;
import android.os.Build;
import android.os.Debug;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.Process;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.Trace;
import android.os.UserHandle;
import android.os.UserManager;
import android.os.storage.StorageManager;
import android.permission.IOnPermissionsChangeListener;
import android.permission.IPermissionChecker;
import android.permission.IPermissionManager;
import android.permission.PermissionCheckerManager;
import android.permission.PermissionControllerManager;
import android.permission.PermissionManager;
import android.permission.PermissionManagerInternal;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.DebugUtils;
import android.util.EventLog;
import android.util.IntArray;
import android.util.Log;
import android.util.Slog;
import android.util.SparseArray;
import android.util.SparseBooleanArray;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.compat.IPlatformCompat;
import com.android.internal.logging.MetricsLogger;
import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
import com.android.internal.os.RoSystemProperties;
import com.android.internal.util.ArrayUtils;
import com.android.internal.util.CollectionUtils;
import com.android.internal.util.DumpUtils;
import com.android.internal.util.IntPair;
import com.android.internal.util.Preconditions;
import com.android.internal.util.function.TriFunction;
import com.android.internal.util.function.pooled.PooledLambda;
import com.android.server.FgThread;
import com.android.server.LocalServices;
import com.android.server.ServiceThread;
import com.android.server.SystemConfig;
import com.android.server.Watchdog;
import com.android.server.pm.ApexManager;
import com.android.server.pm.PackageSetting;
import com.android.server.pm.UserManagerInternal;
import com.android.server.pm.UserManagerService;
import com.android.server.pm.parsing.PackageInfoUtils;
import com.android.server.pm.parsing.pkg.AndroidPackage;
import com.android.server.pm.permission.PermissionManagerServiceInternal.HotwordDetectionServiceProvider;
import com.android.server.pm.permission.PermissionManagerServiceInternal.OnRuntimePermissionStateChangedListener;
import com.android.server.policy.PermissionPolicyInternal;
import com.android.server.policy.SoftRestrictedPermissionPolicy;
import libcore.util.EmptyArray;
import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Objects;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.BiFunction;
/**
* Manages all permissions and handles permissions related tasks.
*/
public class PermissionManagerService extends IPermissionManager.Stub {
private static final String TAG = "PackageManager";
private static final String LOG_TAG = PermissionManagerService.class.getSimpleName();
private static final long BACKUP_TIMEOUT_MILLIS = SECONDS.toMillis(60);
// For automotive products, CarService enforces allow-listing of the privileged permissions
// com.android.car is the package name which declares auto specific permissions
private static final String CAR_PACKAGE_NAME = "com.android.car";
/** Cap the size of permission trees that 3rd party apps can define; in characters of text */
private static final int MAX_PERMISSION_TREE_FOOTPRINT = 32768;
/** Empty array to avoid allocations */
private static final int[] EMPTY_INT_ARRAY = new int[0];
/**
* When these flags are set, the system should not automatically modify the permission grant
* state.
*/
private static final int BLOCKING_PERMISSION_FLAGS = FLAG_PERMISSION_SYSTEM_FIXED
| FLAG_PERMISSION_POLICY_FIXED
| FLAG_PERMISSION_GRANTED_BY_DEFAULT;
/** Permission flags set by the user */
private static final int USER_PERMISSION_FLAGS = FLAG_PERMISSION_USER_SET
| FLAG_PERMISSION_USER_FIXED;
/** All storage permissions */
private static final List<String> STORAGE_PERMISSIONS = new ArrayList<>();
/** All nearby devices permissions */
private static final List<String> NEARBY_DEVICES_PERMISSIONS = new ArrayList<>();
/** If the permission of the value is granted, so is the key */
private static final Map<String, String> FULLER_PERMISSION_MAP = new HashMap<>();
/** Map of IBinder -> Running AttributionSource */
private static final ConcurrentHashMap<IBinder, RegisteredAttribution>
sRunningAttributionSources = new ConcurrentHashMap<>();
static {
FULLER_PERMISSION_MAP.put(Manifest.permission.ACCESS_COARSE_LOCATION,
Manifest.permission.ACCESS_FINE_LOCATION);
FULLER_PERMISSION_MAP.put(Manifest.permission.INTERACT_ACROSS_USERS,
Manifest.permission.INTERACT_ACROSS_USERS_FULL);
STORAGE_PERMISSIONS.add(Manifest.permission.READ_EXTERNAL_STORAGE);
STORAGE_PERMISSIONS.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
STORAGE_PERMISSIONS.add(Manifest.permission.ACCESS_MEDIA_LOCATION);
NEARBY_DEVICES_PERMISSIONS.add(Manifest.permission.BLUETOOTH_ADVERTISE);
NEARBY_DEVICES_PERMISSIONS.add(Manifest.permission.BLUETOOTH_CONNECT);
NEARBY_DEVICES_PERMISSIONS.add(Manifest.permission.BLUETOOTH_SCAN);
}
/** Set of source package names for Privileged Permission Allowlist */
private final ArraySet<String> mPrivilegedPermissionAllowlistSourcePackageNames =
new ArraySet<>();
/** Lock to protect internal data access */
private final Object mLock = new Object();
/** Internal connection to the package manager */
private final PackageManagerInternal mPackageManagerInt;
/** Internal connection to the user manager */
private final UserManagerInternal mUserManagerInt;
@GuardedBy("mLock")
@NonNull
private final DevicePermissionState mState = new DevicePermissionState();
/** Permission controller: User space permission management */
private PermissionControllerManager mPermissionControllerManager;
/** Map of OneTimePermissionUserManagers keyed by userId */
@GuardedBy("mLock")
@NonNull
private final SparseArray<OneTimePermissionUserManager> mOneTimePermissionUserManagers =
new SparseArray<>();
/** App ops manager */
private final AppOpsManager mAppOpsManager;
/**
* Built-in permissions. Read from system configuration files. Mapping is from
* UID to permission name.
*/
private final SparseArray<ArraySet<String>> mSystemPermissions;
/** Built-in group IDs given to all packages. Read from system configuration files. */
@NonNull
private final int[] mGlobalGids;
private final HandlerThread mHandlerThread;
private final Handler mHandler;
private final Context mContext;
private final MetricsLogger mMetricsLogger = new MetricsLogger();
private final IPlatformCompat mPlatformCompat = IPlatformCompat.Stub.asInterface(
ServiceManager.getService(Context.PLATFORM_COMPAT_SERVICE));
/** Internal storage for permissions and related settings */
@GuardedBy("mLock")
@NonNull
private final PermissionRegistry mRegistry = new PermissionRegistry();
@NonNull
private final AttributionSourceRegistry mAttributionSourceRegistry;
@GuardedBy("mLock")
@Nullable
private ArraySet<String> mPrivappPermissionsViolations;
@GuardedBy("mLock")
private boolean mSystemReady;
@GuardedBy("mLock")
private PermissionPolicyInternal mPermissionPolicyInternal;
/**
* A permission backup might contain apps that are not installed. In this case we delay the
* restoration until the app is installed.
*
* <p>This array ({@code userId -> noDelayedBackupLeft}) is {@code true} for all the users where
* there is <u>no more</u> delayed backup left.
*/
@GuardedBy("mLock")
private final SparseBooleanArray mHasNoDelayedPermBackup = new SparseBooleanArray();
/** Listeners for permission state (granting and flags) changes */
@GuardedBy("mLock")
final private ArrayList<OnRuntimePermissionStateChangedListener>
mRuntimePermissionStateChangedListeners = new ArrayList<>();
@GuardedBy("mLock")
private CheckPermissionDelegate mCheckPermissionDelegate;
@NonNull
private final OnPermissionChangeListeners mOnPermissionChangeListeners;
@Nullable
private HotwordDetectionServiceProvider mHotwordDetectionServiceProvider;
// TODO: Take a look at the methods defined in the callback.
// The callback was initially created to support the split between permission
// manager and the package manager. However, it's started to be used for other
// purposes. It may make sense to keep as an abstraction, but, the methods
// necessary to be overridden may be different than what was initially needed
// for the split.
private final PermissionCallback mDefaultPermissionCallback = new PermissionCallback() {
@Override
public void onGidsChanged(int appId, int userId) {
mHandler.post(() -> killUid(appId, userId, KILL_APP_REASON_GIDS_CHANGED));
}
@Override
public void onPermissionGranted(int uid, int userId) {
mOnPermissionChangeListeners.onPermissionsChanged(uid);
// Not critical; if this is lost, the application has to request again.
mPackageManagerInt.writeSettings(true);
}
@Override
public void onInstallPermissionGranted() {
mPackageManagerInt.writeSettings(true);
}
@Override
public void onPermissionRevoked(int uid, int userId, String reason) {
mOnPermissionChangeListeners.onPermissionsChanged(uid);
// Critical; after this call the application should never have the permission
mPackageManagerInt.writeSettings(false);
final int appId = UserHandle.getAppId(uid);
if (reason == null) {
mHandler.post(() -> killUid(appId, userId, KILL_APP_REASON_PERMISSIONS_REVOKED));
} else {
mHandler.post(() -> killUid(appId, userId, reason));
}
}
@Override
public void onInstallPermissionRevoked() {
mPackageManagerInt.writeSettings(true);
}
@Override
public void onPermissionUpdated(int[] userIds, boolean sync) {
mPackageManagerInt.writePermissionSettings(userIds, !sync);
}
@Override
public void onInstallPermissionUpdated() {
mPackageManagerInt.writeSettings(true);
}
@Override
public void onPermissionRemoved() {
mPackageManagerInt.writeSettings(false);
}
public void onPermissionUpdatedNotifyListener(@UserIdInt int[] updatedUserIds, boolean sync,
int uid) {
onPermissionUpdated(updatedUserIds, sync);
for (int i = 0; i < updatedUserIds.length; i++) {
int userUid = UserHandle.getUid(updatedUserIds[i], UserHandle.getAppId(uid));
mOnPermissionChangeListeners.onPermissionsChanged(userUid);
}
}
public void onInstallPermissionUpdatedNotifyListener(int uid) {
onInstallPermissionUpdated();
mOnPermissionChangeListeners.onPermissionsChanged(uid);
}
};
PermissionManagerService(@NonNull Context context,
@NonNull ArrayMap<String, FeatureInfo> availableFeatures) {
// The package info cache is the cache for package and permission information.
// Disable the package info and package permission caches locally but leave the
// checkPermission cache active.
PackageManager.invalidatePackageInfoCache();
PermissionManager.disablePackageNamePermissionCache();
mContext = context;
mPackageManagerInt = LocalServices.getService(PackageManagerInternal.class);
mUserManagerInt = LocalServices.getService(UserManagerInternal.class);
mAppOpsManager = context.getSystemService(AppOpsManager.class);
mPrivilegedPermissionAllowlistSourcePackageNames.add(PLATFORM_PACKAGE_NAME);
// PackageManager.hasSystemFeature() is not used here because PackageManagerService
// isn't ready yet.
if (availableFeatures.containsKey(PackageManager.FEATURE_AUTOMOTIVE)) {
mPrivilegedPermissionAllowlistSourcePackageNames.add(CAR_PACKAGE_NAME);
}
mHandlerThread = new ServiceThread(TAG,
Process.THREAD_PRIORITY_BACKGROUND, true /*allowIo*/);
mHandlerThread.start();
mHandler = new Handler(mHandlerThread.getLooper());
Watchdog.getInstance().addThread(mHandler);
SystemConfig systemConfig = SystemConfig.getInstance();
mSystemPermissions = systemConfig.getSystemPermissions();
mGlobalGids = systemConfig.getGlobalGids();
mOnPermissionChangeListeners = new OnPermissionChangeListeners(FgThread.get().getLooper());
mAttributionSourceRegistry = new AttributionSourceRegistry(context);
// propagate permission configuration
final ArrayMap<String, SystemConfig.PermissionEntry> permConfig =
SystemConfig.getInstance().getPermissions();
synchronized (mLock) {
for (int i=0; i<permConfig.size(); i++) {
final SystemConfig.PermissionEntry perm = permConfig.valueAt(i);
Permission bp = mRegistry.getPermission(perm.name);
if (bp == null) {
bp = new Permission(perm.name, "android", Permission.TYPE_CONFIG);
mRegistry.addPermission(bp);
}
if (perm.gids != null) {
bp.setGids(perm.gids, perm.perUser);
}
}
}
PermissionManagerServiceInternalImpl localService =
new PermissionManagerServiceInternalImpl();
LocalServices.addService(PermissionManagerServiceInternal.class, localService);
LocalServices.addService(PermissionManagerInternal.class, localService);
}
@Override
public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (!DumpUtils.checkDumpPermission(mContext, TAG, pw)) {
return;
}
mContext.getSystemService(PermissionControllerManager.class).dump(fd, args);
}
/**
* Creates and returns an initialized, internal service for use by other components.
* <p>
* The object returned is identical to the one returned by the LocalServices class using:
* {@code LocalServices.getService(PermissionManagerServiceInternal.class);}
* <p>
* NOTE: The external lock is temporary and should be removed. This needs to be a
* lock created by the permission manager itself.
*/
@NonNull
public static PermissionManagerServiceInternal create(@NonNull Context context,
ArrayMap<String, FeatureInfo> availableFeatures) {
final PermissionManagerServiceInternal permMgrInt =
LocalServices.getService(PermissionManagerServiceInternal.class);
if (permMgrInt != null) {
return permMgrInt;
}
PermissionManagerService permissionService =
(PermissionManagerService) ServiceManager.getService("permissionmgr");
if (permissionService == null) {
permissionService = new PermissionManagerService(context, availableFeatures);
ServiceManager.addService("permissionmgr", permissionService);
ServiceManager.addService("permission_checker", new PermissionCheckerService(context));
}
return LocalServices.getService(PermissionManagerServiceInternal.class);
}
/**
* This method should typically only be used when granting or revoking
* permissions, since the app may immediately restart after this call.
* <p>
* If you're doing surgery on app code/data, use {@link PackageFreezer} to
* guard your work against the app being relaunched.
*/
public static void killUid(int appId, int userId, String reason) {
final long identity = Binder.clearCallingIdentity();
try {
IActivityManager am = ActivityManager.getService();
if (am != null) {
try {
am.killUidForPermissionChange(appId, userId, reason);
} catch (RemoteException e) {
/* ignore - same process */
}
}
} finally {
Binder.restoreCallingIdentity(identity);
}
}
@NonNull
private String[] getAppOpPermissionPackagesInternal(@NonNull String permissionName) {
synchronized (mLock) {
final ArraySet<String> packageNames = mRegistry.getAppOpPermissionPackages(
permissionName);
if (packageNames == null) {
return EmptyArray.STRING;
}
return packageNames.toArray(new String[0]);
}
}
@Override
@NonNull
public ParceledListSlice<PermissionGroupInfo> getAllPermissionGroups(
@PermissionGroupInfoFlags int flags) {
final int callingUid = getCallingUid();
if (mPackageManagerInt.getInstantAppPackageName(callingUid) != null) {
return ParceledListSlice.emptyList();
}
final List<PermissionGroupInfo> out = new ArrayList<>();
synchronized (mLock) {
for (ParsedPermissionGroup pg : mRegistry.getPermissionGroups()) {
out.add(PackageInfoUtils.generatePermissionGroupInfo(pg, flags));
}
}
final int callingUserId = UserHandle.getUserId(callingUid);
out.removeIf(it -> mPackageManagerInt.filterAppAccess(it.packageName, callingUid,
callingUserId));
return new ParceledListSlice<>(out);
}
@Override
@Nullable
public PermissionGroupInfo getPermissionGroupInfo(String groupName,
@PermissionGroupInfoFlags int flags) {
final int callingUid = getCallingUid();
if (mPackageManagerInt.getInstantAppPackageName(callingUid) != null) {
return null;
}
final PermissionGroupInfo permissionGroupInfo;
synchronized (mLock) {
final ParsedPermissionGroup permissionGroup = mRegistry.getPermissionGroup(groupName);
if (permissionGroup == null) {
return null;
}
permissionGroupInfo = PackageInfoUtils.generatePermissionGroupInfo(permissionGroup,
flags);
}
final int callingUserId = UserHandle.getUserId(callingUid);
if (mPackageManagerInt.filterAppAccess(permissionGroupInfo.packageName, callingUid,
callingUserId)) {
EventLog.writeEvent(0x534e4554, "186113473", callingUid, groupName);
return null;
}
return permissionGroupInfo;
}
@Override
@Nullable
public PermissionInfo getPermissionInfo(@NonNull String permName, @NonNull String opPackageName,
@PermissionInfoFlags int flags) {
final int callingUid = getCallingUid();
if (mPackageManagerInt.getInstantAppPackageName(callingUid) != null) {
return null;
}
final AndroidPackage opPackage = mPackageManagerInt.getPackage(opPackageName);
final int targetSdkVersion = getPermissionInfoCallingTargetSdkVersion(opPackage,
callingUid);
final PermissionInfo permissionInfo;
synchronized (mLock) {
final Permission bp = mRegistry.getPermission(permName);
if (bp == null) {
return null;
}
permissionInfo = bp.generatePermissionInfo(flags, targetSdkVersion);
}
final int callingUserId = UserHandle.getUserId(callingUid);
if (mPackageManagerInt.filterAppAccess(permissionInfo.packageName, callingUid,
callingUserId)) {
EventLog.writeEvent(0x534e4554, "183122164", callingUid, permName);
return null;
}
return permissionInfo;
}
private int getPermissionInfoCallingTargetSdkVersion(@Nullable AndroidPackage pkg, int uid) {
final int appId = UserHandle.getAppId(uid);
if (appId == Process.ROOT_UID || appId == Process.SYSTEM_UID
|| appId == Process.SHELL_UID) {
// System sees all flags.
return Build.VERSION_CODES.CUR_DEVELOPMENT;
}
if (pkg == null) {
return Build.VERSION_CODES.CUR_DEVELOPMENT;
}
return pkg.getTargetSdkVersion();
}
@Override
@Nullable
public ParceledListSlice<PermissionInfo> queryPermissionsByGroup(String groupName,
@PermissionInfoFlags int flags) {
final int callingUid = getCallingUid();
if (mPackageManagerInt.getInstantAppPackageName(callingUid) != null) {
return null;
}
final List<PermissionInfo> out = new ArrayList<>(10);
synchronized (mLock) {
if (groupName != null && mRegistry.getPermissionGroup(groupName) == null) {
return null;
}
for (Permission bp : mRegistry.getPermissions()) {
if (Objects.equals(bp.getGroup(), groupName)) {
out.add(bp.generatePermissionInfo(flags));
}
}
}
final int callingUserId = UserHandle.getUserId(callingUid);
out.removeIf(it -> mPackageManagerInt.filterAppAccess(it.packageName, callingUid,
callingUserId));
return new ParceledListSlice<>(out);
}
@Override
public boolean addPermission(PermissionInfo info, boolean async) {
final int callingUid = getCallingUid();
if (mPackageManagerInt.getInstantAppPackageName(callingUid) != null) {
throw new SecurityException("Instant apps can't add permissions");
}
if (info.labelRes == 0 && info.nonLocalizedLabel == null) {
throw new SecurityException("Label must be specified in permission");
}
final boolean added;
final boolean changed;
synchronized (mLock) {
final Permission tree = mRegistry.enforcePermissionTree(info.name, callingUid);
Permission bp = mRegistry.getPermission(info.name);
added = bp == null;
int fixedLevel = PermissionInfo.fixProtectionLevel(info.protectionLevel);
if (added) {
enforcePermissionCapLocked(info, tree);
bp = new Permission(info.name, tree.getPackageName(), Permission.TYPE_DYNAMIC);
} else if (!bp.isDynamic()) {
throw new SecurityException("Not allowed to modify non-dynamic permission "
+ info.name);
}
changed = bp.addToTree(fixedLevel, info, tree);
if (added) {
mRegistry.addPermission(bp);
}
}
if (changed) {
mPackageManagerInt.writeSettings(async);
}
return added;
}
@Override
public void removePermission(String permName) {
final int callingUid = getCallingUid();
if (mPackageManagerInt.getInstantAppPackageName(callingUid) != null) {
throw new SecurityException("Instant applications don't have access to this method");
}
synchronized (mLock) {
mRegistry.enforcePermissionTree(permName, callingUid);
final Permission bp = mRegistry.getPermission(permName);
if (bp == null) {
return;
}
if (bp.isDynamic()) {
// TODO: switch this back to SecurityException
Slog.wtf(TAG, "Not allowed to modify non-dynamic permission "
+ permName);
}
mRegistry.removePermission(permName);
}
mPackageManagerInt.writeSettings(false);
}
@Override
public int getPermissionFlags(String packageName, String permName, int userId) {
final int callingUid = getCallingUid();
return getPermissionFlagsInternal(packageName, permName, callingUid, userId);
}
private int getPermissionFlagsInternal(
String packageName, String permName, int callingUid, int userId) {
if (!mUserManagerInt.exists(userId)) {
return 0;
}
enforceGrantRevokeGetRuntimePermissionPermissions("getPermissionFlags");
enforceCrossUserPermission(callingUid, userId,
true, // requireFullPermission
false, // checkShell
"getPermissionFlags");
final AndroidPackage pkg = mPackageManagerInt.getPackage(packageName);
if (pkg == null) {
return 0;
}
if (mPackageManagerInt.filterAppAccess(pkg, callingUid, userId)) {
return 0;
}
synchronized (mLock) {
if (mRegistry.getPermission(permName) == null) {
return 0;
}
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + packageName + " and user " + userId);
return 0;
}
return uidState.getPermissionFlags(permName);
}
}
@Override
public void updatePermissionFlags(String packageName, String permName, int flagMask,
int flagValues, boolean checkAdjustPolicyFlagPermission, int userId) {
final int callingUid = getCallingUid();
boolean overridePolicy = false;
if (callingUid != Process.SYSTEM_UID && callingUid != Process.ROOT_UID) {
final long callingIdentity = Binder.clearCallingIdentity();
try {
if ((flagMask & FLAG_PERMISSION_POLICY_FIXED) != 0) {
if (checkAdjustPolicyFlagPermission) {
mContext.enforceCallingOrSelfPermission(
Manifest.permission.ADJUST_RUNTIME_PERMISSIONS_POLICY,
"Need " + Manifest.permission.ADJUST_RUNTIME_PERMISSIONS_POLICY
+ " to change policy flags");
} else if (mPackageManagerInt.getUidTargetSdkVersion(callingUid)
>= Build.VERSION_CODES.Q) {
throw new IllegalArgumentException(
Manifest.permission.ADJUST_RUNTIME_PERMISSIONS_POLICY + " needs "
+ " to be checked for packages targeting "
+ Build.VERSION_CODES.Q + " or later when changing policy "
+ "flags");
}
overridePolicy = true;
}
} finally {
Binder.restoreCallingIdentity(callingIdentity);
}
}
updatePermissionFlagsInternal(
packageName, permName, flagMask, flagValues, callingUid, userId,
overridePolicy, mDefaultPermissionCallback);
}
private void updatePermissionFlagsInternal(String packageName, String permName, int flagMask,
int flagValues, int callingUid, int userId, boolean overridePolicy,
PermissionCallback callback) {
if (PermissionManager.DEBUG_TRACE_PERMISSION_UPDATES
&& PermissionManager.shouldTraceGrant(packageName, permName, userId)) {
Log.i(TAG, "System is updating flags for " + packageName + " "
+ permName + " for user " + userId + " "
+ DebugUtils.flagsToString(
PackageManager.class, "FLAG_PERMISSION_", flagMask)
+ " := "
+ DebugUtils.flagsToString(
PackageManager.class, "FLAG_PERMISSION_", flagValues)
+ " on behalf of uid " + callingUid
+ " " + mPackageManagerInt.getNameForUid(callingUid),
new RuntimeException());
}
if (!mUserManagerInt.exists(userId)) {
return;
}
enforceGrantRevokeRuntimePermissionPermissions("updatePermissionFlags");
enforceCrossUserPermission(callingUid, userId,
true, // requireFullPermission
true, // checkShell
"updatePermissionFlags");
if ((flagMask & FLAG_PERMISSION_POLICY_FIXED) != 0 && !overridePolicy) {
throw new SecurityException("updatePermissionFlags requires "
+ Manifest.permission.ADJUST_RUNTIME_PERMISSIONS_POLICY);
}
// Only the system can change these flags and nothing else.
if (callingUid != Process.SYSTEM_UID) {
flagMask &= ~PackageManager.FLAG_PERMISSION_SYSTEM_FIXED;
flagValues &= ~PackageManager.FLAG_PERMISSION_SYSTEM_FIXED;
flagMask &= ~PackageManager.FLAG_PERMISSION_GRANTED_BY_DEFAULT;
flagValues &= ~PackageManager.FLAG_PERMISSION_GRANTED_BY_DEFAULT;
flagValues &= ~PackageManager.FLAG_PERMISSION_REVIEW_REQUIRED;
flagValues &= ~FLAG_PERMISSION_RESTRICTION_SYSTEM_EXEMPT;
flagValues &= ~FLAG_PERMISSION_RESTRICTION_INSTALLER_EXEMPT;
flagValues &= ~FLAG_PERMISSION_RESTRICTION_UPGRADE_EXEMPT;
flagValues &= ~PackageManager.FLAG_PERMISSION_APPLY_RESTRICTION;
}
final AndroidPackage pkg = mPackageManagerInt.getPackage(packageName);
if (pkg == null) {
Log.e(TAG, "Unknown package: " + packageName);
return;
}
if (mPackageManagerInt.filterAppAccess(pkg, callingUid, userId)) {
throw new IllegalArgumentException("Unknown package: " + packageName);
}
boolean isRequested = false;
// Fast path, the current package has requested the permission.
if (pkg.getRequestedPermissions().contains(permName)) {
isRequested = true;
}
if (!isRequested) {
// Slow path, go through all shared user packages.
String[] sharedUserPackageNames =
mPackageManagerInt.getSharedUserPackagesForPackage(packageName, userId);
for (String sharedUserPackageName : sharedUserPackageNames) {
AndroidPackage sharedUserPkg = mPackageManagerInt.getPackage(
sharedUserPackageName);
if (sharedUserPkg != null
&& sharedUserPkg.getRequestedPermissions().contains(permName)) {
isRequested = true;
break;
}
}
}
final boolean isRuntimePermission;
final boolean permissionUpdated;
synchronized (mLock) {
final Permission bp = mRegistry.getPermission(permName);
if (bp == null) {
throw new IllegalArgumentException("Unknown permission: " + permName);
}
isRuntimePermission = bp.isRuntime();
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + packageName + " and user " + userId);
return;
}
if (!uidState.hasPermissionState(permName) && !isRequested) {
Log.e(TAG, "Permission " + permName + " isn't requested by package " + packageName);
return;
}
permissionUpdated = uidState.updatePermissionFlags(bp, flagMask, flagValues);
}
if (permissionUpdated && isRuntimePermission) {
notifyRuntimePermissionStateChanged(packageName, userId);
}
if (permissionUpdated && callback != null) {
// Install and runtime permissions are stored in different places,
// so figure out what permission changed and persist the change.
if (!isRuntimePermission) {
int userUid = UserHandle.getUid(userId, pkg.getUid());
callback.onInstallPermissionUpdatedNotifyListener(userUid);
} else {
callback.onPermissionUpdatedNotifyListener(new int[]{userId}, false, pkg.getUid());
}
}
}
/**
* Update the permission flags for all packages and runtime permissions of a user in order
* to allow device or profile owner to remove POLICY_FIXED.
*/
@Override
public void updatePermissionFlagsForAllApps(int flagMask, int flagValues,
final int userId) {
final int callingUid = getCallingUid();
if (!mUserManagerInt.exists(userId)) {
return;
}
enforceGrantRevokeRuntimePermissionPermissions(
"updatePermissionFlagsForAllApps");
enforceCrossUserPermission(callingUid, userId,
true, // requireFullPermission
true, // checkShell
"updatePermissionFlagsForAllApps");
// Only the system can change system fixed flags.
final int effectiveFlagMask = (callingUid != Process.SYSTEM_UID)
? flagMask : flagMask & ~PackageManager.FLAG_PERMISSION_SYSTEM_FIXED;
final int effectiveFlagValues = (callingUid != Process.SYSTEM_UID)
? flagValues : flagValues & ~PackageManager.FLAG_PERMISSION_SYSTEM_FIXED;
final boolean[] changed = new boolean[1];
mPackageManagerInt.forEachPackage(pkg -> {
synchronized (mLock) {
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG,
"Missing permissions state for " + pkg.getPackageName() + " and user "
+ userId);
return;
}
changed[0] |= uidState.updatePermissionFlagsForAllPermissions(
effectiveFlagMask, effectiveFlagValues);
}
mOnPermissionChangeListeners.onPermissionsChanged(pkg.getUid());
});
if (changed[0]) {
mPackageManagerInt.writePermissionSettings(new int[] { userId }, true);
}
}
private int checkPermission(String pkgName, String permName, @UserIdInt int userId) {
// Not using Objects.requireNonNull() here for compatibility reasons.
if (pkgName == null || permName == null) {
return PackageManager.PERMISSION_DENIED;
}
if (!mUserManagerInt.exists(userId)) {
return PackageManager.PERMISSION_DENIED;
}
final CheckPermissionDelegate checkPermissionDelegate;
synchronized (mLock) {
checkPermissionDelegate = mCheckPermissionDelegate;
}
if (checkPermissionDelegate == null) {
return checkPermissionImpl(pkgName, permName, userId);
}
return checkPermissionDelegate.checkPermission(pkgName, permName, userId,
this::checkPermissionImpl);
}
private int checkPermissionImpl(String pkgName, String permName, int userId) {
final AndroidPackage pkg = mPackageManagerInt.getPackage(pkgName);
if (pkg == null) {
return PackageManager.PERMISSION_DENIED;
}
return checkPermissionInternal(pkg, true, permName, userId);
}
private int checkPermissionInternal(@NonNull AndroidPackage pkg, boolean isPackageExplicit,
@NonNull String permissionName, @UserIdInt int userId) {
final int callingUid = getCallingUid();
if (isPackageExplicit || pkg.getSharedUserId() == null) {
if (mPackageManagerInt.filterAppAccess(pkg, callingUid, userId)) {
return PackageManager.PERMISSION_DENIED;
}
} else {
if (mPackageManagerInt.getInstantAppPackageName(callingUid) != null) {
return PackageManager.PERMISSION_DENIED;
}
}
final int uid = UserHandle.getUid(userId, pkg.getUid());
final boolean isInstantApp = mPackageManagerInt.getInstantAppPackageName(uid) != null;
synchronized (mLock) {
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + pkg.getPackageName() + " and user "
+ userId);
return PackageManager.PERMISSION_DENIED;
}
if (checkSinglePermissionInternalLocked(uidState, permissionName, isInstantApp)) {
return PackageManager.PERMISSION_GRANTED;
}
final String fullerPermissionName = FULLER_PERMISSION_MAP.get(permissionName);
if (fullerPermissionName != null && checkSinglePermissionInternalLocked(uidState,
fullerPermissionName, isInstantApp)) {
return PackageManager.PERMISSION_GRANTED;
}
}
return PackageManager.PERMISSION_DENIED;
}
@GuardedBy("mLock")
private boolean checkSinglePermissionInternalLocked(@NonNull UidPermissionState uidState,
@NonNull String permissionName, boolean isInstantApp) {
if (!uidState.isPermissionGranted(permissionName)) {
return false;
}
if (isInstantApp) {
final Permission permission = mRegistry.getPermission(permissionName);
return permission != null && permission.isInstant();
}
return true;
}
private int checkUidPermission(int uid, String permName) {
// Not using Objects.requireNonNull() here for compatibility reasons.
if (permName == null) {
return PackageManager.PERMISSION_DENIED;
}
final int userId = UserHandle.getUserId(uid);
if (!mUserManagerInt.exists(userId)) {
return PackageManager.PERMISSION_DENIED;
}
final CheckPermissionDelegate checkPermissionDelegate;
synchronized (mLock) {
checkPermissionDelegate = mCheckPermissionDelegate;
}
if (checkPermissionDelegate == null) {
return checkUidPermissionImpl(uid, permName);
}
return checkPermissionDelegate.checkUidPermission(uid, permName,
this::checkUidPermissionImpl);
}
private int checkUidPermissionImpl(int uid, String permName) {
final AndroidPackage pkg = mPackageManagerInt.getPackage(uid);
return checkUidPermissionInternal(pkg, uid, permName);
}
/**
* Checks whether or not the given package has been granted the specified
* permission. If the given package is {@code null}, we instead check the
* system permissions for the given UID.
*
* @see SystemConfig#getSystemPermissions()
*/
private int checkUidPermissionInternal(@Nullable AndroidPackage pkg, int uid,
@NonNull String permissionName) {
if (pkg != null) {
final int userId = UserHandle.getUserId(uid);
return checkPermissionInternal(pkg, false, permissionName, userId);
}
synchronized (mLock) {
if (checkSingleUidPermissionInternalLocked(uid, permissionName)) {
return PackageManager.PERMISSION_GRANTED;
}
final String fullerPermissionName = FULLER_PERMISSION_MAP.get(permissionName);
if (fullerPermissionName != null
&& checkSingleUidPermissionInternalLocked(uid, fullerPermissionName)) {
return PackageManager.PERMISSION_GRANTED;
}
}
return PackageManager.PERMISSION_DENIED;
}
@GuardedBy("mLock")
private boolean checkSingleUidPermissionInternalLocked(int uid,
@NonNull String permissionName) {
ArraySet<String> permissions = mSystemPermissions.get(uid);
return permissions != null && permissions.contains(permissionName);
}
@Override
public void addOnPermissionsChangeListener(IOnPermissionsChangeListener listener) {
mContext.enforceCallingOrSelfPermission(
Manifest.permission.OBSERVE_GRANT_REVOKE_PERMISSIONS,
"addOnPermissionsChangeListener");
mOnPermissionChangeListeners.addListener(listener);
}
@Override
public void removeOnPermissionsChangeListener(IOnPermissionsChangeListener listener) {
if (mPackageManagerInt.getInstantAppPackageName(Binder.getCallingUid()) != null) {
throw new SecurityException("Instant applications don't have access to this method");
}
mOnPermissionChangeListeners.removeListener(listener);
}
@Nullable
@Override
public List<String> getAllowlistedRestrictedPermissions(@NonNull String packageName,
@PermissionWhitelistFlags int flags, @UserIdInt int userId) {
Objects.requireNonNull(packageName);
Preconditions.checkFlagsArgument(flags,
PackageManager.FLAG_PERMISSION_WHITELIST_UPGRADE
| PackageManager.FLAG_PERMISSION_WHITELIST_SYSTEM
| PackageManager.FLAG_PERMISSION_WHITELIST_INSTALLER);
Preconditions.checkArgumentNonNegative(userId, null);
if (UserHandle.getCallingUserId() != userId) {
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.INTERACT_ACROSS_USERS,
"getAllowlistedRestrictedPermissions for user " + userId);
}
final AndroidPackage pkg = mPackageManagerInt.getPackage(packageName);
if (pkg == null) {
return null;
}
final int callingUid = Binder.getCallingUid();
if (mPackageManagerInt.filterAppAccess(pkg, callingUid, UserHandle.getCallingUserId())) {
return null;
}
final boolean isCallerPrivileged = mContext.checkCallingOrSelfPermission(
Manifest.permission.WHITELIST_RESTRICTED_PERMISSIONS)
== PackageManager.PERMISSION_GRANTED;
final boolean isCallerInstallerOnRecord =
mPackageManagerInt.isCallerInstallerOfRecord(pkg, callingUid);
if ((flags & PackageManager.FLAG_PERMISSION_WHITELIST_SYSTEM) != 0
&& !isCallerPrivileged) {
throw new SecurityException("Querying system allowlist requires "
+ Manifest.permission.WHITELIST_RESTRICTED_PERMISSIONS);
}
if ((flags & (PackageManager.FLAG_PERMISSION_WHITELIST_UPGRADE
| PackageManager.FLAG_PERMISSION_WHITELIST_INSTALLER)) != 0) {
if (!isCallerPrivileged && !isCallerInstallerOnRecord) {
throw new SecurityException("Querying upgrade or installer allowlist"
+ " requires being installer on record or "
+ Manifest.permission.WHITELIST_RESTRICTED_PERMISSIONS);
}
}
final long identity = Binder.clearCallingIdentity();
try {
return getAllowlistedRestrictedPermissionsInternal(pkg, flags, userId);
} finally {
Binder.restoreCallingIdentity(identity);
}
}
@Nullable
private List<String> getAllowlistedRestrictedPermissionsInternal(@NonNull AndroidPackage pkg,
@PermissionWhitelistFlags int flags, @UserIdInt int userId) {
synchronized (mLock) {
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + pkg.getPackageName() + " and user "
+ userId);
return null;
}
int queryFlags = 0;
if ((flags & PackageManager.FLAG_PERMISSION_WHITELIST_SYSTEM) != 0) {
queryFlags |= FLAG_PERMISSION_RESTRICTION_SYSTEM_EXEMPT;
}
if ((flags & PackageManager.FLAG_PERMISSION_WHITELIST_UPGRADE) != 0) {
queryFlags |= FLAG_PERMISSION_RESTRICTION_UPGRADE_EXEMPT;
}
if ((flags & PackageManager.FLAG_PERMISSION_WHITELIST_INSTALLER) != 0) {
queryFlags |= FLAG_PERMISSION_RESTRICTION_INSTALLER_EXEMPT;
}
ArrayList<String> allowlistedPermissions = null;
final int permissionCount = ArrayUtils.size(pkg.getRequestedPermissions());
for (int i = 0; i < permissionCount; i++) {
final String permissionName = pkg.getRequestedPermissions().get(i);
final int currentFlags =
uidState.getPermissionFlags(permissionName);
if ((currentFlags & queryFlags) != 0) {
if (allowlistedPermissions == null) {
allowlistedPermissions = new ArrayList<>();
}
allowlistedPermissions.add(permissionName);
}
}
return allowlistedPermissions;
}
}
@Override
public boolean addAllowlistedRestrictedPermission(@NonNull String packageName,
@NonNull String permName, @PermissionWhitelistFlags int flags,
@UserIdInt int userId) {
// Other argument checks are done in get/setAllowlistedRestrictedPermissions
Objects.requireNonNull(permName);
if (!checkExistsAndEnforceCannotModifyImmutablyRestrictedPermission(permName)) {
return false;
}
List<String> permissions =
getAllowlistedRestrictedPermissions(packageName, flags, userId);
if (permissions == null) {
permissions = new ArrayList<>(1);
}
if (permissions.indexOf(permName) < 0) {
permissions.add(permName);
return setAllowlistedRestrictedPermissions(packageName, permissions,
flags, userId);
}
return false;
}
private boolean checkExistsAndEnforceCannotModifyImmutablyRestrictedPermission(
@NonNull String permName) {
final boolean isImmutablyRestrictedPermission;
synchronized (mLock) {
final Permission bp = mRegistry.getPermission(permName);
if (bp == null) {
Slog.w(TAG, "No such permissions: " + permName);
return false;
}
isImmutablyRestrictedPermission = bp.isHardOrSoftRestricted()
&& bp.isImmutablyRestricted();
}
if (isImmutablyRestrictedPermission && mContext.checkCallingOrSelfPermission(
Manifest.permission.WHITELIST_RESTRICTED_PERMISSIONS)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException("Cannot modify allowlisting of an immutably "
+ "restricted permission: " + permName);
}
return true;
}
@Override
public boolean removeAllowlistedRestrictedPermission(@NonNull String packageName,
@NonNull String permName, @PermissionWhitelistFlags int flags,
@UserIdInt int userId) {
// Other argument checks are done in get/setAllowlistedRestrictedPermissions
Objects.requireNonNull(permName);
if (!checkExistsAndEnforceCannotModifyImmutablyRestrictedPermission(permName)) {
return false;
}
final List<String> permissions =
getAllowlistedRestrictedPermissions(packageName, flags, userId);
if (permissions != null && permissions.remove(permName)) {
return setAllowlistedRestrictedPermissions(packageName, permissions,
flags, userId);
}
return false;
}
private boolean setAllowlistedRestrictedPermissions(@NonNull String packageName,
@Nullable List<String> permissions, @PermissionWhitelistFlags int flags,
@UserIdInt int userId) {
Objects.requireNonNull(packageName);
Preconditions.checkFlagsArgument(flags,
PackageManager.FLAG_PERMISSION_WHITELIST_UPGRADE
| PackageManager.FLAG_PERMISSION_WHITELIST_SYSTEM
| PackageManager.FLAG_PERMISSION_WHITELIST_INSTALLER);
Preconditions.checkArgument(Integer.bitCount(flags) == 1);
Preconditions.checkArgumentNonNegative(userId, null);
if (UserHandle.getCallingUserId() != userId) {
mContext.enforceCallingOrSelfPermission(
Manifest.permission.INTERACT_ACROSS_USERS,
"setAllowlistedRestrictedPermissions for user " + userId);
}
final AndroidPackage pkg = mPackageManagerInt.getPackage(packageName);
if (pkg == null) {
return false;
}
final int callingUid = Binder.getCallingUid();
if (mPackageManagerInt.filterAppAccess(pkg, callingUid, UserHandle.getCallingUserId())) {
return false;
}
final boolean isCallerPrivileged = mContext.checkCallingOrSelfPermission(
Manifest.permission.WHITELIST_RESTRICTED_PERMISSIONS)
== PackageManager.PERMISSION_GRANTED;
final boolean isCallerInstallerOnRecord =
mPackageManagerInt.isCallerInstallerOfRecord(pkg, callingUid);
if ((flags & PackageManager.FLAG_PERMISSION_WHITELIST_SYSTEM) != 0 && !isCallerPrivileged) {
throw new SecurityException("Modifying system allowlist requires "
+ Manifest.permission.WHITELIST_RESTRICTED_PERMISSIONS);
}
if ((flags & PackageManager.FLAG_PERMISSION_WHITELIST_UPGRADE) != 0) {
if (!isCallerPrivileged && !isCallerInstallerOnRecord) {
throw new SecurityException("Modifying upgrade allowlist requires"
+ " being installer on record or "
+ Manifest.permission.WHITELIST_RESTRICTED_PERMISSIONS);
}
final List<String> allowlistedPermissions =
getAllowlistedRestrictedPermissions(pkg.getPackageName(), flags, userId);
if (permissions == null || permissions.isEmpty()) {
if (allowlistedPermissions == null || allowlistedPermissions.isEmpty()) {
return true;
}
} else {
// Only the system can add and remove while the installer can only remove.
final int permissionCount = permissions.size();
for (int i = 0; i < permissionCount; i++) {
if ((allowlistedPermissions == null
|| !allowlistedPermissions.contains(permissions.get(i)))
&& !isCallerPrivileged) {
throw new SecurityException("Adding to upgrade allowlist requires"
+ Manifest.permission.WHITELIST_RESTRICTED_PERMISSIONS);
}
}
}
if ((flags & PackageManager.FLAG_PERMISSION_WHITELIST_INSTALLER) != 0) {
if (!isCallerPrivileged && !isCallerInstallerOnRecord) {
throw new SecurityException("Modifying installer allowlist requires"
+ " being installer on record or "
+ Manifest.permission.WHITELIST_RESTRICTED_PERMISSIONS);
}
}
}
final long identity = Binder.clearCallingIdentity();
try {
setAllowlistedRestrictedPermissionsInternal(pkg, permissions, flags, userId);
} finally {
Binder.restoreCallingIdentity(identity);
}
return true;
}
@Override
public boolean setAutoRevokeExempted(
@NonNull String packageName, boolean exempted, int userId) {
Objects.requireNonNull(packageName);
final AndroidPackage pkg = mPackageManagerInt.getPackage(packageName);
final int callingUid = Binder.getCallingUid();
if (!checkAutoRevokeAccess(pkg, callingUid)) {
return false;
}
return setAutoRevokeExemptedInternal(pkg, exempted, userId);
}
private boolean setAutoRevokeExemptedInternal(@NonNull AndroidPackage pkg, boolean exempted,
@UserIdInt int userId) {
final int packageUid = UserHandle.getUid(userId, pkg.getUid());
if (mAppOpsManager.checkOpNoThrow(AppOpsManager.OP_AUTO_REVOKE_MANAGED_BY_INSTALLER,
packageUid, pkg.getPackageName()) != MODE_ALLOWED) {
// Allowlist user set - don't override
return false;
}
final long identity = Binder.clearCallingIdentity();
try {
mAppOpsManager.setMode(AppOpsManager.OP_AUTO_REVOKE_PERMISSIONS_IF_UNUSED, packageUid,
pkg.getPackageName(), exempted ? MODE_IGNORED : MODE_ALLOWED);
} finally {
Binder.restoreCallingIdentity(identity);
}
return true;
}
private boolean checkAutoRevokeAccess(AndroidPackage pkg, int callingUid) {
if (pkg == null) {
return false;
}
final boolean isCallerPrivileged = mContext.checkCallingOrSelfPermission(
Manifest.permission.WHITELIST_AUTO_REVOKE_PERMISSIONS)
== PackageManager.PERMISSION_GRANTED;
final boolean isCallerInstallerOnRecord =
mPackageManagerInt.isCallerInstallerOfRecord(pkg, callingUid);
if (!isCallerPrivileged && !isCallerInstallerOnRecord) {
throw new SecurityException("Caller must either hold "
+ Manifest.permission.WHITELIST_AUTO_REVOKE_PERMISSIONS
+ " or be the installer on record");
}
return true;
}
@Override
public boolean isAutoRevokeExempted(@NonNull String packageName, int userId) {
Objects.requireNonNull(packageName);
final AndroidPackage pkg = mPackageManagerInt.getPackage(packageName);
final int callingUid = Binder.getCallingUid();
if (mPackageManagerInt.filterAppAccess(packageName, callingUid, userId)) {
return false;
}
if (!checkAutoRevokeAccess(pkg, callingUid)) {
return false;
}
final int packageUid = UserHandle.getUid(userId, pkg.getUid());
final long identity = Binder.clearCallingIdentity();
try {
return mAppOpsManager.checkOpNoThrow(
AppOpsManager.OP_AUTO_REVOKE_PERMISSIONS_IF_UNUSED, packageUid, packageName)
== MODE_IGNORED;
} finally {
Binder.restoreCallingIdentity(identity);
}
}
@Override
public void grantRuntimePermission(String packageName, String permName, final int userId) {
final int callingUid = Binder.getCallingUid();
final boolean overridePolicy =
checkUidPermission(callingUid, ADJUST_RUNTIME_PERMISSIONS_POLICY)
== PackageManager.PERMISSION_GRANTED;
grantRuntimePermissionInternal(packageName, permName, overridePolicy,
callingUid, userId, mDefaultPermissionCallback);
}
private void grantRuntimePermissionInternal(String packageName, String permName,
boolean overridePolicy, int callingUid, final int userId, PermissionCallback callback) {
if (PermissionManager.DEBUG_TRACE_GRANTS
&& PermissionManager.shouldTraceGrant(packageName, permName, userId)) {
Log.i(PermissionManager.LOG_TAG_TRACE_GRANTS, "System is granting " + packageName + " "
+ permName + " for user " + userId + " on behalf of uid " + callingUid
+ " " + mPackageManagerInt.getNameForUid(callingUid),
new RuntimeException());
}
if (!mUserManagerInt.exists(userId)) {
Log.e(TAG, "No such user:" + userId);
return;
}
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.GRANT_RUNTIME_PERMISSIONS,
"grantRuntimePermission");
enforceCrossUserPermission(callingUid, userId,
true, // requireFullPermission
true, // checkShell
"grantRuntimePermission");
final AndroidPackage pkg = mPackageManagerInt.getPackage(packageName);
final PackageSetting ps = mPackageManagerInt.getPackageSetting(packageName);
if (pkg == null || ps == null) {
Log.e(TAG, "Unknown package: " + packageName);
return;
}
if (mPackageManagerInt.filterAppAccess(pkg, callingUid, userId)) {
throw new IllegalArgumentException("Unknown package: " + packageName);
}
final boolean isRolePermission;
final boolean isSoftRestrictedPermission;
synchronized (mLock) {
final Permission permission = mRegistry.getPermission(permName);
if (permission == null) {
throw new IllegalArgumentException("Unknown permission: " + permName);
}
isRolePermission = permission.isRole();
isSoftRestrictedPermission = permission.isSoftRestricted();
}
final boolean mayGrantRolePermission = isRolePermission
&& mayManageRolePermission(callingUid);
final boolean mayGrantSoftRestrictedPermission = isSoftRestrictedPermission
&& SoftRestrictedPermissionPolicy.forPermission(mContext,
pkg.toAppInfoWithoutState(), pkg, UserHandle.of(userId), permName)
.mayGrantPermission();
final boolean isRuntimePermission;
final boolean permissionHasGids;
synchronized (mLock) {
final Permission bp = mRegistry.getPermission(permName);
if (bp == null) {
throw new IllegalArgumentException("Unknown permission: " + permName);
}
isRuntimePermission = bp.isRuntime();
permissionHasGids = bp.hasGids();
if (isRuntimePermission || bp.isDevelopment()) {
// Good.
} else if (bp.isRole()) {
if (!mayGrantRolePermission) {
throw new SecurityException("Permission " + permName + " is managed by role");
}
} else {
throw new SecurityException("Permission " + permName + " requested by "
+ pkg.getPackageName() + " is not a changeable permission type");
}
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + pkg.getPackageName() + " and user "
+ userId);
return;
}
if (!(uidState.hasPermissionState(permName)
|| pkg.getRequestedPermissions().contains(permName))) {
throw new SecurityException("Package " + pkg.getPackageName()
+ " has not requested permission " + permName);
}
// If a permission review is required for legacy apps we represent
// their permissions as always granted runtime ones since we need
// to keep the review required permission flag per user while an
// install permission's state is shared across all users.
if (pkg.getTargetSdkVersion() < Build.VERSION_CODES.M && bp.isRuntime()) {
return;
}
final int flags = uidState.getPermissionFlags(permName);
if ((flags & PackageManager.FLAG_PERMISSION_SYSTEM_FIXED) != 0) {
Log.e(TAG, "Cannot grant system fixed permission "
+ permName + " for package " + packageName);
return;
}
if (!overridePolicy && (flags & PackageManager.FLAG_PERMISSION_POLICY_FIXED) != 0) {
Log.e(TAG, "Cannot grant policy fixed permission "
+ permName + " for package " + packageName);
return;
}
if (bp.isHardRestricted()
&& (flags & PackageManager.FLAGS_PERMISSION_RESTRICTION_ANY_EXEMPT) == 0) {
Log.e(TAG, "Cannot grant hard restricted non-exempt permission "
+ permName + " for package " + packageName);
return;
}
if (bp.isSoftRestricted() && !mayGrantSoftRestrictedPermission) {
Log.e(TAG, "Cannot grant soft restricted permission " + permName + " for package "
+ packageName);
return;
}
if (bp.isDevelopment() || bp.isRole()) {
// Development permissions must be handled specially, since they are not
// normal runtime permissions. For now they apply to all users.
// TODO(zhanghai): We are breaking the behavior above by making all permission state
// per-user. It isn't documented behavior and relatively rarely used anyway.
if (!uidState.grantPermission(bp)) {
return;
}
} else {
if (ps.getInstantApp(userId) && !bp.isInstant()) {
throw new SecurityException("Cannot grant non-ephemeral permission" + permName
+ " for package " + packageName);
}
if (pkg.getTargetSdkVersion() < Build.VERSION_CODES.M) {
Slog.w(TAG, "Cannot grant runtime permission to a legacy app");
return;
}
if (!uidState.grantPermission(bp)) {
return;
}
}
}
if (isRuntimePermission) {
logPermission(MetricsEvent.ACTION_PERMISSION_GRANTED, permName, packageName);
}
final int uid = UserHandle.getUid(userId, pkg.getUid());
if (callback != null) {
if (isRuntimePermission) {
callback.onPermissionGranted(uid, userId);
} else {
callback.onInstallPermissionGranted();
}
if (permissionHasGids) {
callback.onGidsChanged(UserHandle.getAppId(pkg.getUid()), userId);
}
}
if (isRuntimePermission) {
notifyRuntimePermissionStateChanged(packageName, userId);
}
}
@Override
public void revokeRuntimePermission(String packageName, String permName, int userId,
String reason) {
final int callingUid = Binder.getCallingUid();
final boolean overridePolicy =
checkUidPermission(callingUid, ADJUST_RUNTIME_PERMISSIONS_POLICY)
== PackageManager.PERMISSION_GRANTED;
revokeRuntimePermissionInternal(packageName, permName, overridePolicy, callingUid, userId,
reason, mDefaultPermissionCallback);
}
private void revokeRuntimePermissionInternal(String packageName, String permName,
boolean overridePolicy, int callingUid, final int userId, String reason,
PermissionCallback callback) {
if (PermissionManager.DEBUG_TRACE_PERMISSION_UPDATES
&& PermissionManager.shouldTraceGrant(packageName, permName, userId)) {
Log.i(TAG, "System is revoking " + packageName + " "
+ permName + " for user " + userId + " on behalf of uid " + callingUid
+ " " + mPackageManagerInt.getNameForUid(callingUid),
new RuntimeException());
}
if (!mUserManagerInt.exists(userId)) {
Log.e(TAG, "No such user:" + userId);
return;
}
mContext.enforceCallingOrSelfPermission(
android.Manifest.permission.REVOKE_RUNTIME_PERMISSIONS,
"revokeRuntimePermission");
enforceCrossUserPermission(callingUid, userId,
true, // requireFullPermission
true, // checkShell
"revokeRuntimePermission");
final AndroidPackage pkg = mPackageManagerInt.getPackage(packageName);
if (pkg == null) {
Log.e(TAG, "Unknown package: " + packageName);
return;
}
if (mPackageManagerInt.filterAppAccess(pkg, callingUid, userId)) {
throw new IllegalArgumentException("Unknown package: " + packageName);
}
final boolean isRolePermission;
synchronized (mLock) {
final Permission permission = mRegistry.getPermission(permName);
if (permission == null) {
throw new IllegalArgumentException("Unknown permission: " + permName);
}
isRolePermission = permission.isRole();
}
final boolean mayRevokeRolePermission = isRolePermission
// Allow ourselves to revoke role permissions due to definition changes.
&& (callingUid == Process.myUid() || mayManageRolePermission(callingUid));
final boolean isRuntimePermission;
synchronized (mLock) {
final Permission bp = mRegistry.getPermission(permName);
if (bp == null) {
throw new IllegalArgumentException("Unknown permission: " + permName);
}
isRuntimePermission = bp.isRuntime();
if (isRuntimePermission || bp.isDevelopment()) {
// Good.
} else if (bp.isRole()) {
if (!mayRevokeRolePermission) {
throw new SecurityException("Permission " + permName + " is managed by role");
}
} else {
throw new SecurityException("Permission " + permName + " requested by "
+ pkg.getPackageName() + " is not a changeable permission type");
}
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + pkg.getPackageName() + " and user "
+ userId);
return;
}
if (!(uidState.hasPermissionState(permName)
|| pkg.getRequestedPermissions().contains(permName))) {
throw new SecurityException("Package " + pkg.getPackageName()
+ " has not requested permission " + permName);
}
// If a permission review is required for legacy apps we represent
// their permissions as always granted runtime ones since we need
// to keep the review required permission flag per user while an
// install permission's state is shared across all users.
if (pkg.getTargetSdkVersion() < Build.VERSION_CODES.M && bp.isRuntime()) {
return;
}
final int flags = uidState.getPermissionFlags(permName);
// Only the system may revoke SYSTEM_FIXED permissions.
if ((flags & PackageManager.FLAG_PERMISSION_SYSTEM_FIXED) != 0
&& UserHandle.getCallingAppId() != Process.SYSTEM_UID) {
throw new SecurityException("Non-System UID cannot revoke system fixed permission "
+ permName + " for package " + packageName);
}
if (!overridePolicy && (flags & PackageManager.FLAG_PERMISSION_POLICY_FIXED) != 0) {
throw new SecurityException("Cannot revoke policy fixed permission "
+ permName + " for package " + packageName);
}
// Development permissions must be handled specially, since they are not
// normal runtime permissions. For now they apply to all users.
// TODO(zhanghai): We are breaking the behavior above by making all permission state
// per-user. It isn't documented behavior and relatively rarely used anyway.
if (!uidState.revokePermission(bp)) {
return;
}
}
if (isRuntimePermission) {
logPermission(MetricsEvent.ACTION_PERMISSION_REVOKED, permName, packageName);
}
if (callback != null) {
if (isRuntimePermission) {
callback.onPermissionRevoked(UserHandle.getUid(userId, pkg.getUid()), userId,
reason);
} else {
mDefaultPermissionCallback.onInstallPermissionRevoked();
}
}
if (isRuntimePermission) {
notifyRuntimePermissionStateChanged(packageName, userId);
}
}
private boolean mayManageRolePermission(int uid) {
final PackageManager packageManager = mContext.getPackageManager();
final String[] packageNames = packageManager.getPackagesForUid(uid);
if (packageNames == null) {
return false;
}
final String permissionControllerPackageName =
packageManager.getPermissionControllerPackageName();
return Arrays.asList(packageNames).contains(permissionControllerPackageName);
}
/**
* Reverts user permission state changes (permissions and flags).
*
* @param pkg The package for which to reset.
* @param userId The device user for which to do a reset.
*/
private void resetRuntimePermissionsInternal(@NonNull AndroidPackage pkg,
@UserIdInt int userId) {
final String packageName = pkg.getPackageName();
// These are flags that can change base on user actions.
final int userSettableMask = FLAG_PERMISSION_USER_SET
| FLAG_PERMISSION_USER_FIXED
| FLAG_PERMISSION_REVOKED_COMPAT
| FLAG_PERMISSION_REVIEW_REQUIRED
| FLAG_PERMISSION_ONE_TIME
| FLAG_PERMISSION_SELECTED_LOCATION_ACCURACY;
final int policyOrSystemFlags = FLAG_PERMISSION_SYSTEM_FIXED
| FLAG_PERMISSION_POLICY_FIXED;
// Delay and combine non-async permission callbacks
final int permissionCount = ArrayUtils.size(pkg.getRequestedPermissions());
final boolean[] permissionRemoved = new boolean[1];
final ArraySet<Long> revokedPermissions = new ArraySet<>();
final IntArray syncUpdatedUsers = new IntArray(permissionCount);
final IntArray asyncUpdatedUsers = new IntArray(permissionCount);
PermissionCallback delayingPermCallback = new PermissionCallback() {
public void onGidsChanged(int appId, int userId) {
mDefaultPermissionCallback.onGidsChanged(appId, userId);
}
public void onPermissionChanged() {
mDefaultPermissionCallback.onPermissionChanged();
}
public void onPermissionGranted(int uid, int userId) {
mDefaultPermissionCallback.onPermissionGranted(uid, userId);
}
public void onInstallPermissionGranted() {
mDefaultPermissionCallback.onInstallPermissionGranted();
}
public void onPermissionRevoked(int uid, int userId, String reason) {
revokedPermissions.add(IntPair.of(uid, userId));
syncUpdatedUsers.add(userId);
}
public void onInstallPermissionRevoked() {
mDefaultPermissionCallback.onInstallPermissionRevoked();
}
public void onPermissionUpdated(int[] updatedUserIds, boolean sync) {
for (int userId : updatedUserIds) {
if (sync) {
syncUpdatedUsers.add(userId);
asyncUpdatedUsers.remove(userId);
} else {
// Don't override sync=true by sync=false
if (syncUpdatedUsers.indexOf(userId) == -1) {
asyncUpdatedUsers.add(userId);
}
}
}
}
public void onPermissionRemoved() {
permissionRemoved[0] = true;
}
public void onInstallPermissionUpdated() {
mDefaultPermissionCallback.onInstallPermissionUpdated();
}
public void onPermissionUpdatedNotifyListener(@UserIdInt int[] updatedUserIds,
boolean sync, int uid) {
onPermissionUpdated(updatedUserIds, sync);
mOnPermissionChangeListeners.onPermissionsChanged(uid);
}
public void onInstallPermissionUpdatedNotifyListener(int uid) {
mDefaultPermissionCallback.onInstallPermissionUpdatedNotifyListener(uid);
}
};
for (int i = 0; i < permissionCount; i++) {
final String permName = pkg.getRequestedPermissions().get(i);
final boolean isRuntimePermission;
synchronized (mLock) {
final Permission permission = mRegistry.getPermission(permName);
if (permission == null) {
continue;
}
if (permission.isRemoved()) {
continue;
}
isRuntimePermission = permission.isRuntime();
}
// If shared user we just reset the state to which only this app contributed.
final String[] pkgNames = mPackageManagerInt.getSharedUserPackagesForPackage(
pkg.getPackageName(), userId);
if (pkgNames.length > 0) {
boolean used = false;
for (String sharedPkgName : pkgNames) {
final AndroidPackage sharedPkg =
mPackageManagerInt.getPackage(sharedPkgName);
if (sharedPkg != null && !sharedPkg.getPackageName().equals(packageName)
&& sharedPkg.getRequestedPermissions().contains(permName)) {
used = true;
break;
}
}
if (used) {
continue;
}
}
final int oldFlags =
getPermissionFlagsInternal(packageName, permName, Process.SYSTEM_UID, userId);
// Always clear the user settable flags.
// If permission review is enabled and this is a legacy app, mark the
// permission as requiring a review as this is the initial state.
final int uid = mPackageManagerInt.getPackageUid(packageName, 0, userId);
final int targetSdk = mPackageManagerInt.getUidTargetSdkVersion(uid);
final int flags = (targetSdk < Build.VERSION_CODES.M && isRuntimePermission)
? FLAG_PERMISSION_REVIEW_REQUIRED | FLAG_PERMISSION_REVOKED_COMPAT
: 0;
updatePermissionFlagsInternal(
packageName, permName, userSettableMask, flags, Process.SYSTEM_UID, userId,
false, delayingPermCallback);
// Below is only runtime permission handling.
if (!isRuntimePermission) {
continue;
}
// Never clobber system or policy.
if ((oldFlags & policyOrSystemFlags) != 0) {
continue;
}
// If this permission was granted by default or role, make sure it is.
if ((oldFlags & FLAG_PERMISSION_GRANTED_BY_DEFAULT) != 0
|| (oldFlags & FLAG_PERMISSION_GRANTED_BY_ROLE) != 0) {
// PermissionPolicyService will handle the app op for runtime permissions later.
grantRuntimePermissionInternal(packageName, permName, false,
Process.SYSTEM_UID, userId, delayingPermCallback);
// In certain cases we should leave the state unchanged:
// -- If permission review is enabled the permissions for a legacy apps
// are represented as constantly granted runtime ones
// -- If the permission was split from a non-runtime permission
} else if ((flags & FLAG_PERMISSION_REVIEW_REQUIRED) == 0
&& !isPermissionSplitFromNonRuntime(permName, targetSdk)) {
// Otherwise, reset the permission.
revokeRuntimePermissionInternal(packageName, permName, false, Process.SYSTEM_UID,
userId, null, delayingPermCallback);
}
}
// Execute delayed callbacks
if (permissionRemoved[0]) {
mDefaultPermissionCallback.onPermissionRemoved();
}
// Slight variation on the code in mPermissionCallback.onPermissionRevoked() as we cannot
// kill uid while holding mPackages-lock
if (!revokedPermissions.isEmpty()) {
int numRevokedPermissions = revokedPermissions.size();
for (int i = 0; i < numRevokedPermissions; i++) {
int revocationUID = IntPair.first(revokedPermissions.valueAt(i));
int revocationUserId = IntPair.second(revokedPermissions.valueAt(i));
mOnPermissionChangeListeners.onPermissionsChanged(revocationUID);
// Kill app later as we are holding mPackages
mHandler.post(() -> killUid(UserHandle.getAppId(revocationUID), revocationUserId,
KILL_APP_REASON_PERMISSIONS_REVOKED));
}
}
mPackageManagerInt.writePermissionSettings(syncUpdatedUsers.toArray(), false);
mPackageManagerInt.writePermissionSettings(asyncUpdatedUsers.toArray(), true);
}
/**
* Determine if the given permission should be treated as split from a
* non-runtime permission for an application targeting the given SDK level.
*/
private boolean isPermissionSplitFromNonRuntime(String permName, int targetSdk) {
final List<PermissionManager.SplitPermissionInfo> splitPerms = getSplitPermissionInfos();
final int size = splitPerms.size();
for (int i = 0; i < size; i++) {
final PermissionManager.SplitPermissionInfo splitPerm = splitPerms.get(i);
if (targetSdk < splitPerm.getTargetSdk()
&& splitPerm.getNewPermissions().contains(permName)) {
synchronized (mLock) {
final Permission perm =
mRegistry.getPermission(splitPerm.getSplitPermission());
return perm != null && !perm.isRuntime();
}
}
}
return false;
}
/**
* This change makes it so that apps are told to show rationale for asking for background
* location access every time they request.
*/
@ChangeId
@EnabledAfter(targetSdkVersion = Build.VERSION_CODES.Q)
private static final long BACKGROUND_RATIONALE_CHANGE_ID = 147316723L;
@Override
public boolean shouldShowRequestPermissionRationale(String packageName, String permName,
@UserIdInt int userId) {
final int callingUid = Binder.getCallingUid();
if (UserHandle.getCallingUserId() != userId) {
mContext.enforceCallingPermission(
android.Manifest.permission.INTERACT_ACROSS_USERS_FULL,
"canShowRequestPermissionRationale for user " + userId);
}
final int uid =
mPackageManagerInt.getPackageUid(packageName, MATCH_DEBUG_TRIAGED_MISSING, userId);
if (UserHandle.getAppId(callingUid) != UserHandle.getAppId(uid)) {
return false;
}
if (checkPermission(packageName, permName, userId)
== PackageManager.PERMISSION_GRANTED) {
return false;
}
final int flags;
final long identity = Binder.clearCallingIdentity();
try {
flags = getPermissionFlagsInternal(packageName, permName, callingUid, userId);
} finally {
Binder.restoreCallingIdentity(identity);
}
final int fixedFlags = PackageManager.FLAG_PERMISSION_SYSTEM_FIXED
| PackageManager.FLAG_PERMISSION_POLICY_FIXED
| PackageManager.FLAG_PERMISSION_USER_FIXED;
if ((flags & fixedFlags) != 0) {
return false;
}
synchronized (mLock) {
final Permission permission = mRegistry.getPermission(permName);
if (permission == null) {
return false;
}
if (permission.isHardRestricted()
&& (flags & FLAGS_PERMISSION_RESTRICTION_ANY_EXEMPT) == 0) {
return false;
}
}
final long token = Binder.clearCallingIdentity();
try {
if (permName.equals(Manifest.permission.ACCESS_BACKGROUND_LOCATION)
&& mPlatformCompat.isChangeEnabledByPackageName(BACKGROUND_RATIONALE_CHANGE_ID,
packageName, userId)) {
return true;
}
} catch (RemoteException e) {
Log.e(TAG, "Unable to check if compatibility change is enabled.", e);
} finally {
Binder.restoreCallingIdentity(token);
}
return (flags & PackageManager.FLAG_PERMISSION_USER_SET) != 0;
}
@Override
public boolean isPermissionRevokedByPolicy(String packageName, String permName, int userId) {
if (UserHandle.getCallingUserId() != userId) {
mContext.enforceCallingPermission(
android.Manifest.permission.INTERACT_ACROSS_USERS_FULL,
"isPermissionRevokedByPolicy for user " + userId);
}
if (checkPermission(packageName, permName, userId) == PackageManager.PERMISSION_GRANTED) {
return false;
}
final int callingUid = Binder.getCallingUid();
if (mPackageManagerInt.filterAppAccess(packageName, callingUid, userId)) {
return false;
}
final long identity = Binder.clearCallingIdentity();
try {
final int flags = getPermissionFlagsInternal(packageName, permName, callingUid, userId);
return (flags & PackageManager.FLAG_PERMISSION_POLICY_FIXED) != 0;
} finally {
Binder.restoreCallingIdentity(identity);
}
}
/**
* Get the state of the runtime permissions as xml file.
*
* <p>Can not be called on main thread.
*
* @param userId The user ID the data should be extracted for
*
* @return The state as a xml file
*/
@Nullable
private byte[] backupRuntimePermissions(@UserIdInt int userId) {
CompletableFuture<byte[]> backup = new CompletableFuture<>();
mPermissionControllerManager.getRuntimePermissionBackup(UserHandle.of(userId),
mContext.getMainExecutor(), backup::complete);
try {
return backup.get(BACKUP_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
} catch (InterruptedException | ExecutionException | TimeoutException e) {
Slog.e(TAG, "Cannot create permission backup for user " + userId, e);
return null;
}
}
/**
* Restore a permission state previously backed up via {@link #backupRuntimePermissions}.
*
* <p>If not all state can be restored, the un-appliable state will be delayed and can be
* applied via {@link #restoreDelayedRuntimePermissions}.
*
* @param backup The state as an xml file
* @param userId The user ID the data should be restored for
*/
private void restoreRuntimePermissions(@NonNull byte[] backup, @UserIdInt int userId) {
synchronized (mLock) {
mHasNoDelayedPermBackup.delete(userId);
}
mPermissionControllerManager.stageAndApplyRuntimePermissionsBackup(backup,
UserHandle.of(userId));
}
/**
* Try to apply permission backup that was previously not applied.
*
* <p>Can not be called on main thread.
*
* @param packageName The package that is newly installed
* @param userId The user ID the package is installed for
*
* @see #restoreRuntimePermissions
*/
private void restoreDelayedRuntimePermissions(@NonNull String packageName,
@UserIdInt int userId) {
synchronized (mLock) {
if (mHasNoDelayedPermBackup.get(userId, false)) {
return;
}
}
mPermissionControllerManager.applyStagedRuntimePermissionBackup(packageName,
UserHandle.of(userId), mContext.getMainExecutor(), (hasMoreBackup) -> {
if (hasMoreBackup) {
return;
}
synchronized (mLock) {
mHasNoDelayedPermBackup.put(userId, true);
}
});
}
private void addOnRuntimePermissionStateChangedListener(@NonNull
OnRuntimePermissionStateChangedListener listener) {
synchronized (mLock) {
mRuntimePermissionStateChangedListeners.add(listener);
}
}
private void removeOnRuntimePermissionStateChangedListener(@NonNull
OnRuntimePermissionStateChangedListener listener) {
synchronized (mLock) {
mRuntimePermissionStateChangedListeners.remove(listener);
}
}
private void notifyRuntimePermissionStateChanged(@NonNull String packageName,
@UserIdInt int userId) {
FgThread.getHandler().sendMessage(PooledLambda.obtainMessage
(PermissionManagerService::doNotifyRuntimePermissionStateChanged,
PermissionManagerService.this, packageName, userId));
}
private void doNotifyRuntimePermissionStateChanged(@NonNull String packageName,
@UserIdInt int userId) {
final ArrayList<OnRuntimePermissionStateChangedListener> listeners;
synchronized (mLock) {
if (mRuntimePermissionStateChangedListeners.isEmpty()) {
return;
}
listeners = new ArrayList<>(mRuntimePermissionStateChangedListeners);
}
final int listenerCount = listeners.size();
for (int i = 0; i < listenerCount; i++) {
listeners.get(i).onRuntimePermissionStateChanged(packageName, userId);
}
}
private void startShellPermissionIdentityDelegationInternal(int uid,
@NonNull String packageName, @Nullable List<String> permissionNames) {
synchronized (mLock) {
final CheckPermissionDelegate oldDelegate = mCheckPermissionDelegate;
if (oldDelegate != null && oldDelegate.getDelegatedUid() != uid) {
throw new SecurityException(
"Shell can delegate permissions only to one UID at a time");
}
final ShellDelegate delegate = new ShellDelegate(uid, packageName, permissionNames);
setCheckPermissionDelegateLocked(delegate);
}
}
private void stopShellPermissionIdentityDelegationInternal() {
synchronized (mLock) {
setCheckPermissionDelegateLocked(null);
}
}
@Nullable
private List<String> getDelegatedShellPermissionsInternal() {
synchronized (mLock) {
if (mCheckPermissionDelegate == null) {
return Collections.EMPTY_LIST;
}
return mCheckPermissionDelegate.getDelegatedPermissionNames();
}
}
private void setCheckPermissionDelegateLocked(@Nullable CheckPermissionDelegate delegate) {
if (delegate != null || mCheckPermissionDelegate != null) {
PackageManager.invalidatePackageInfoCache();
}
mCheckPermissionDelegate = delegate;
}
/**
* If the app is updated, and has scoped storage permissions, then it is possible that the
* app updated in an attempt to get unscoped storage. If so, revoke all storage permissions.
* @param newPackage The new package that was installed
* @param oldPackage The old package that was updated
*/
private void revokeStoragePermissionsIfScopeExpandedInternal(
@NonNull AndroidPackage newPackage,
@NonNull AndroidPackage oldPackage) {
boolean downgradedSdk = oldPackage.getTargetSdkVersion() >= Build.VERSION_CODES.Q
&& newPackage.getTargetSdkVersion() < Build.VERSION_CODES.Q;
boolean upgradedSdk = oldPackage.getTargetSdkVersion() < Build.VERSION_CODES.Q
&& newPackage.getTargetSdkVersion() >= Build.VERSION_CODES.Q;
boolean newlyRequestsLegacy = !upgradedSdk && !oldPackage.isRequestLegacyExternalStorage()
&& newPackage.isRequestLegacyExternalStorage();
if (!newlyRequestsLegacy && !downgradedSdk) {
return;
}
final int callingUid = Binder.getCallingUid();
for (int userId: getAllUserIds()) {
int numRequestedPermissions = newPackage.getRequestedPermissions().size();
for (int i = 0; i < numRequestedPermissions; i++) {
PermissionInfo permInfo = getPermissionInfo(
newPackage.getRequestedPermissions().get(i),
newPackage.getPackageName(), 0);
if (permInfo == null || !STORAGE_PERMISSIONS.contains(permInfo.name)) {
continue;
}
EventLog.writeEvent(0x534e4554, "171430330", newPackage.getUid(),
"Revoking permission " + permInfo.name + " from package "
+ newPackage.getPackageName() + " as either the sdk downgraded "
+ downgradedSdk + " or newly requested legacy full storage "
+ newlyRequestsLegacy);
try {
revokeRuntimePermissionInternal(newPackage.getPackageName(), permInfo.name,
false, callingUid, userId, null, mDefaultPermissionCallback);
} catch (IllegalStateException | SecurityException e) {
Log.e(TAG, "unable to revoke " + permInfo.name + " for "
+ newPackage.getPackageName() + " user " + userId, e);
}
}
}
}
/**
* We might auto-grant permissions if any permission of the group is already granted. Hence if
* the group of a granted permission changes we need to revoke it to avoid having permissions of
* the new group auto-granted.
*
* @param newPackage The new package that was installed
* @param oldPackage The old package that was updated
*/
private void revokeRuntimePermissionsIfGroupChangedInternal(@NonNull AndroidPackage newPackage,
@NonNull AndroidPackage oldPackage) {
final int numOldPackagePermissions = ArrayUtils.size(oldPackage.getPermissions());
final ArrayMap<String, String> oldPermissionNameToGroupName
= new ArrayMap<>(numOldPackagePermissions);
for (int i = 0; i < numOldPackagePermissions; i++) {
final ParsedPermission permission = oldPackage.getPermissions().get(i);
if (permission.getParsedPermissionGroup() != null) {
oldPermissionNameToGroupName.put(permission.getName(),
permission.getParsedPermissionGroup().getName());
}
}
final int callingUid = Binder.getCallingUid();
final int numNewPackagePermissions = ArrayUtils.size(newPackage.getPermissions());
for (int newPermissionNum = 0; newPermissionNum < numNewPackagePermissions;
newPermissionNum++) {
final ParsedPermission newPermission =
newPackage.getPermissions().get(newPermissionNum);
final int newProtection = newPermission.getProtection();
if ((newProtection & PermissionInfo.PROTECTION_DANGEROUS) != 0) {
final String permissionName = newPermission.getName();
final String newPermissionGroupName =
newPermission.getParsedPermissionGroup() == null
? null : newPermission.getParsedPermissionGroup().getName();
final String oldPermissionGroupName = oldPermissionNameToGroupName.get(
permissionName);
if (newPermissionGroupName != null
&& !newPermissionGroupName.equals(oldPermissionGroupName)) {
final int[] userIds = mUserManagerInt.getUserIds();
mPackageManagerInt.forEachPackage(pkg -> {
final String packageName = pkg.getPackageName();
for (final int userId : userIds) {
final int permissionState = checkPermission(packageName, permissionName,
userId);
if (permissionState == PackageManager.PERMISSION_GRANTED) {
EventLog.writeEvent(0x534e4554, "72710897",
newPackage.getUid(),
"Revoking permission " + permissionName +
" from package " + packageName +
" as the group changed from " + oldPermissionGroupName +
" to " + newPermissionGroupName);
try {
revokeRuntimePermissionInternal(packageName, permissionName,
false, callingUid, userId, null,
mDefaultPermissionCallback);
} catch (IllegalArgumentException e) {
Slog.e(TAG, "Could not revoke " + permissionName + " from "
+ packageName, e);
}
}
}
});
}
}
}
}
/**
* If permissions are upgraded to runtime, or their owner changes to the system, then any
* granted permissions must be revoked.
*
* @param permissionsToRevoke A list of permission names to revoke
*/
private void revokeRuntimePermissionsIfPermissionDefinitionChangedInternal(
@NonNull List<String> permissionsToRevoke) {
final int[] userIds = mUserManagerInt.getUserIds();
final int numPermissions = permissionsToRevoke.size();
final int callingUid = Binder.getCallingUid();
for (int permNum = 0; permNum < numPermissions; permNum++) {
final String permName = permissionsToRevoke.get(permNum);
final boolean isInternalPermission;
synchronized (mLock) {
final Permission bp = mRegistry.getPermission(permName);
if (bp == null || !(bp.isInternal() || bp.isRuntime())) {
continue;
}
isInternalPermission = bp.isInternal();
}
mPackageManagerInt.forEachPackage(pkg -> {
final String packageName = pkg.getPackageName();
final int appId = pkg.getUid();
if (appId < Process.FIRST_APPLICATION_UID) {
// do not revoke from system apps
return;
}
for (final int userId : userIds) {
final int permissionState = checkPermissionImpl(packageName, permName,
userId);
final int flags = getPermissionFlags(packageName, permName, userId);
final int flagMask = FLAG_PERMISSION_SYSTEM_FIXED
| FLAG_PERMISSION_POLICY_FIXED
| FLAG_PERMISSION_GRANTED_BY_DEFAULT
| FLAG_PERMISSION_GRANTED_BY_ROLE;
if (permissionState == PackageManager.PERMISSION_GRANTED
&& (flags & flagMask) == 0) {
final int uid = UserHandle.getUid(userId, appId);
if (isInternalPermission) {
EventLog.writeEvent(0x534e4554, "195338390", uid,
"Revoking permission " + permName + " from package "
+ packageName + " due to definition change");
} else {
EventLog.writeEvent(0x534e4554, "154505240", uid,
"Revoking permission " + permName + " from package "
+ packageName + " due to definition change");
EventLog.writeEvent(0x534e4554, "168319670", uid,
"Revoking permission " + permName + " from package "
+ packageName + " due to definition change");
}
Slog.e(TAG, "Revoking permission " + permName + " from package "
+ packageName + " due to definition change");
try {
revokeRuntimePermissionInternal(packageName, permName,
false, callingUid, userId, null, mDefaultPermissionCallback);
} catch (Exception e) {
Slog.e(TAG, "Could not revoke " + permName + " from "
+ packageName, e);
}
}
}
});
}
}
private List<String> addAllPermissionsInternal(@NonNull AndroidPackage pkg) {
final int N = ArrayUtils.size(pkg.getPermissions());
ArrayList<String> definitionChangedPermissions = new ArrayList<>();
for (int i=0; i<N; i++) {
ParsedPermission p = pkg.getPermissions().get(i);
// Assume by default that we did not install this permission into the system.
p.setFlags(p.getFlags() & ~PermissionInfo.FLAG_INSTALLED);
final PermissionInfo permissionInfo;
final Permission oldPermission;
synchronized (mLock) {
// Now that permission groups have a special meaning, we ignore permission
// groups for legacy apps to prevent unexpected behavior. In particular,
// permissions for one app being granted to someone just because they happen
// to be in a group defined by another app (before this had no implications).
if (pkg.getTargetSdkVersion() > Build.VERSION_CODES.LOLLIPOP_MR1) {
p.setParsedPermissionGroup(mRegistry.getPermissionGroup(p.getGroup()));
// Warn for a permission in an unknown group.
if (DEBUG_PERMISSIONS
&& p.getGroup() != null && p.getParsedPermissionGroup() == null) {
Slog.i(TAG, "Permission " + p.getName() + " from package "
+ p.getPackageName() + " in an unknown group " + p.getGroup());
}
}
permissionInfo = PackageInfoUtils.generatePermissionInfo(p,
PackageManager.GET_META_DATA);
oldPermission = p.isTree() ? mRegistry.getPermissionTree(p.getName())
: mRegistry.getPermission(p.getName());
}
// TODO(zhanghai): Maybe we should store whether a permission is owned by system inside
// itself.
final boolean isOverridingSystemPermission = Permission.isOverridingSystemPermission(
oldPermission, permissionInfo, mPackageManagerInt);
synchronized (mLock) {
final Permission permission = Permission.createOrUpdate(oldPermission,
permissionInfo, pkg, mRegistry.getPermissionTrees(),
isOverridingSystemPermission);
if (p.isTree()) {
mRegistry.addPermissionTree(permission);
} else {
mRegistry.addPermission(permission);
}
if (permission.isInstalled()) {
p.setFlags(p.getFlags() | PermissionInfo.FLAG_INSTALLED);
}
if (permission.isDefinitionChanged()) {
definitionChangedPermissions.add(p.getName());
permission.setDefinitionChanged(false);
}
}
}
return definitionChangedPermissions;
}
private void addAllPermissionGroupsInternal(@NonNull AndroidPackage pkg) {
synchronized (mLock) {
final int N = ArrayUtils.size(pkg.getPermissionGroups());
StringBuilder r = null;
for (int i = 0; i < N; i++) {
final ParsedPermissionGroup pg = pkg.getPermissionGroups().get(i);
final ParsedPermissionGroup cur = mRegistry.getPermissionGroup(pg.getName());
final String curPackageName = (cur == null) ? null : cur.getPackageName();
final boolean isPackageUpdate = pg.getPackageName().equals(curPackageName);
if (cur == null || isPackageUpdate) {
mRegistry.addPermissionGroup(pg);
if (DEBUG_PACKAGE_SCANNING) {
if (r == null) {
r = new StringBuilder(256);
} else {
r.append(' ');
}
if (isPackageUpdate) {
r.append("UPD:");
}
r.append(pg.getName());
}
} else {
Slog.w(TAG, "Permission group " + pg.getName() + " from package "
+ pg.getPackageName() + " ignored: original from "
+ cur.getPackageName());
if (DEBUG_PACKAGE_SCANNING) {
if (r == null) {
r = new StringBuilder(256);
} else {
r.append(' ');
}
r.append("DUP:");
r.append(pg.getName());
}
}
}
if (r != null && DEBUG_PACKAGE_SCANNING) {
Log.d(TAG, " Permission Groups: " + r);
}
}
}
private void removeAllPermissionsInternal(@NonNull AndroidPackage pkg) {
synchronized (mLock) {
int N = ArrayUtils.size(pkg.getPermissions());
StringBuilder r = null;
for (int i=0; i<N; i++) {
ParsedPermission p = pkg.getPermissions().get(i);
Permission bp = mRegistry.getPermission(p.getName());
if (bp == null) {
bp = mRegistry.getPermissionTree(p.getName());
}
if (bp != null && bp.isPermission(p)) {
bp.setPermissionInfo(null);
if (DEBUG_REMOVE) {
if (r == null) {
r = new StringBuilder(256);
} else {
r.append(' ');
}
r.append(p.getName());
}
}
if (p.isAppOp()) {
// TODO(zhanghai): Should we just remove the entry for this permission directly?
mRegistry.removeAppOpPermissionPackage(p.getName(), pkg.getPackageName());
}
}
if (r != null) {
if (DEBUG_REMOVE) Log.d(TAG, " Permissions: " + r);
}
N = pkg.getRequestedPermissions().size();
r = null;
for (int i=0; i<N; i++) {
final String permissionName = pkg.getRequestedPermissions().get(i);
final Permission permission = mRegistry.getPermission(permissionName);
if (permission != null && permission.isAppOp()) {
mRegistry.removeAppOpPermissionPackage(permissionName,
pkg.getPackageName());
}
}
if (r != null) {
if (DEBUG_REMOVE) Log.d(TAG, " Permissions: " + r);
}
}
}
private void onUserRemoved(@UserIdInt int userId) {
synchronized (mLock) {
mState.removeUserState(userId);
}
}
@NonNull
private Set<String> getGrantedPermissionsInternal(@NonNull String packageName,
@UserIdInt int userId) {
final PackageSetting ps = mPackageManagerInt.getPackageSetting(packageName);
if (ps == null) {
return Collections.emptySet();
}
synchronized (mLock) {
final UidPermissionState uidState = getUidStateLocked(ps, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + packageName + " and user " + userId);
return Collections.emptySet();
}
if (!ps.getInstantApp(userId)) {
return uidState.getGrantedPermissions();
} else {
// Install permission state is shared among all users, but instant app state is
// per-user, so we can only filter it here unless we make install permission state
// per-user as well.
final Set<String> instantPermissions =
new ArraySet<>(uidState.getGrantedPermissions());
instantPermissions.removeIf(permissionName -> {
Permission permission = mRegistry.getPermission(permissionName);
if (permission == null) {
return true;
}
if (!permission.isInstant()) {
EventLog.writeEvent(0x534e4554, "140256621", UserHandle.getUid(userId,
ps.getAppId()), permissionName);
return true;
}
return false;
});
return instantPermissions;
}
}
}
@NonNull
private int[] getPermissionGidsInternal(@NonNull String permissionName, @UserIdInt int userId) {
synchronized (mLock) {
Permission permission = mRegistry.getPermission(permissionName);
if (permission == null) {
return EmptyArray.INT;
}
return permission.computeGids(userId);
}
}
/**
* Restore the permission state for a package.
*
* <ul>
* <li>During boot the state gets restored from the disk</li>
* <li>During app update the state gets restored from the last version of the app</li>
* </ul>
*
* @param pkg the package the permissions belong to
* @param replace if the package is getting replaced (this might change the requested
* permissions of this package)
* @param packageOfInterest If this is the name of {@code pkg} add extra logging
* @param callback Result call back
* @param filterUserId If not {@link UserHandle.USER_ALL}, only restore the permission state for
* this particular user
*/
private void restorePermissionState(@NonNull AndroidPackage pkg, boolean replace,
@Nullable String packageOfInterest, @Nullable PermissionCallback callback,
@UserIdInt int filterUserId) {
// IMPORTANT: There are two types of permissions: install and runtime.
// Install time permissions are granted when the app is installed to
// all device users and users added in the future. Runtime permissions
// are granted at runtime explicitly to specific users. Normal and signature
// protected permissions are install time permissions. Dangerous permissions
// are install permissions if the app's target SDK is Lollipop MR1 or older,
// otherwise they are runtime permissions. This function does not manage
// runtime permissions except for the case an app targeting Lollipop MR1
// being upgraded to target a newer SDK, in which case dangerous permissions
// are transformed from install time to runtime ones.
final PackageSetting ps = (PackageSetting) mPackageManagerInt.getPackageSetting(
pkg.getPackageName());
if (ps == null) {
return;
}
final int[] userIds = filterUserId == UserHandle.USER_ALL ? getAllUserIds()
: new int[] { filterUserId };
boolean runtimePermissionsRevoked = false;
int[] updatedUserIds = EMPTY_INT_ARRAY;
ArraySet<String> isPrivilegedPermissionAllowlisted = null;
ArraySet<String> shouldGrantSignaturePermission = null;
ArraySet<String> shouldGrantInternalPermission = null;
ArraySet<String> shouldGrantPrivilegedPermissionIfWasGranted = new ArraySet<>();
final List<String> requestedPermissions = pkg.getRequestedPermissions();
final int requestedPermissionsSize = requestedPermissions.size();
for (int i = 0; i < requestedPermissionsSize; i++) {
final String permissionName = pkg.getRequestedPermissions().get(i);
final Permission permission;
synchronized (mLock) {
permission = mRegistry.getPermission(permissionName);
}
if (permission == null) {
continue;
}
if (permission.isPrivileged()
&& checkPrivilegedPermissionAllowlist(pkg, ps, permission)) {
if (isPrivilegedPermissionAllowlisted == null) {
isPrivilegedPermissionAllowlisted = new ArraySet<>();
}
isPrivilegedPermissionAllowlisted.add(permissionName);
}
if (permission.isSignature() && (shouldGrantPermissionBySignature(pkg, permission)
|| shouldGrantPermissionByProtectionFlags(pkg, ps, permission,
shouldGrantPrivilegedPermissionIfWasGranted))) {
if (shouldGrantSignaturePermission == null) {
shouldGrantSignaturePermission = new ArraySet<>();
}
shouldGrantSignaturePermission.add(permissionName);
}
if (permission.isInternal()
&& shouldGrantPermissionByProtectionFlags(pkg, ps, permission,
shouldGrantPrivilegedPermissionIfWasGranted)) {
if (shouldGrantInternalPermission == null) {
shouldGrantInternalPermission = new ArraySet<>();
}
shouldGrantInternalPermission.add(permissionName);
}
}
final SparseBooleanArray isPermissionPolicyInitialized = new SparseBooleanArray();
if (mPermissionPolicyInternal != null) {
for (final int userId : userIds) {
if (mPermissionPolicyInternal.isInitialized(userId)) {
isPermissionPolicyInitialized.put(userId, true);
}
}
}
synchronized (mLock) {
for (final int userId : userIds) {
final UserPermissionState userState = mState.getOrCreateUserState(userId);
final UidPermissionState uidState = userState.getOrCreateUidState(ps.getAppId());
if (uidState.isMissing()) {
Collection<String> uidRequestedPermissions;
int targetSdkVersion;
if (!ps.isSharedUser()) {
uidRequestedPermissions = pkg.getRequestedPermissions();
targetSdkVersion = pkg.getTargetSdkVersion();
} else {
uidRequestedPermissions = new ArraySet<>();
targetSdkVersion = Build.VERSION_CODES.CUR_DEVELOPMENT;
List<AndroidPackage> packages = ps.getSharedUser().getPackages();
int packagesSize = packages.size();
for (int i = 0; i < packagesSize; i++) {
AndroidPackage sharedUserPackage = packages.get(i);
uidRequestedPermissions.addAll(
sharedUserPackage.getRequestedPermissions());
targetSdkVersion = Math.min(targetSdkVersion,
sharedUserPackage.getTargetSdkVersion());
}
}
for (String permissionName : uidRequestedPermissions) {
Permission permission = mRegistry.getPermission(permissionName);
if (permission == null) {
continue;
}
if (Objects.equals(permission.getPackageName(), PLATFORM_PACKAGE_NAME)
&& permission.isRuntime() && !permission.isRemoved()) {
if (permission.isHardOrSoftRestricted()
|| permission.isImmutablyRestricted()) {
uidState.updatePermissionFlags(permission,
FLAG_PERMISSION_RESTRICTION_UPGRADE_EXEMPT,
FLAG_PERMISSION_RESTRICTION_UPGRADE_EXEMPT);
}
if (targetSdkVersion < Build.VERSION_CODES.M) {
uidState.updatePermissionFlags(permission,
PackageManager.FLAG_PERMISSION_REVIEW_REQUIRED
| PackageManager.FLAG_PERMISSION_REVOKED_COMPAT,
PackageManager.FLAG_PERMISSION_REVIEW_REQUIRED
| PackageManager.FLAG_PERMISSION_REVOKED_COMPAT);
uidState.grantPermission(permission);
}
}
}
uidState.setMissing(false);
updatedUserIds = ArrayUtils.appendInt(updatedUserIds, userId);
}
UidPermissionState origState = uidState;
boolean changedInstallPermission = false;
if (replace) {
userState.setInstallPermissionsFixed(ps.name, false);
if (!ps.isSharedUser()) {
origState = new UidPermissionState(uidState);
uidState.reset();
} else {
// We need to know only about runtime permission changes since the
// calling code always writes the install permissions state but
// the runtime ones are written only if changed. The only cases of
// changed runtime permissions here are promotion of an install to
// runtime and revocation of a runtime from a shared user.
if (revokeUnusedSharedUserPermissionsLocked(
ps.getSharedUser().getPackages(), uidState)) {
updatedUserIds = ArrayUtils.appendInt(updatedUserIds, userId);
runtimePermissionsRevoked = true;
}
}
}
ArraySet<String> newImplicitPermissions = new ArraySet<>();
final String friendlyName = pkg.getPackageName() + "(" + pkg.getUid() + ")";
for (int i = 0; i < requestedPermissionsSize; i++) {
final String permName = requestedPermissions.get(i);
final Permission bp = mRegistry.getPermission(permName);
final boolean appSupportsRuntimePermissions =
pkg.getTargetSdkVersion() >= Build.VERSION_CODES.M;
String legacyActivityRecognitionPermission = null;
if (DEBUG_INSTALL && bp != null) {
Log.i(TAG, "Package " + friendlyName
+ " checking " + permName + ": " + bp);
}
// TODO(zhanghai): I don't think we need to check source package setting if
// permission is present, because otherwise the permission should have been
// removed.
if (bp == null /*|| getSourcePackageSetting(bp) == null*/) {
if (packageOfInterest == null || packageOfInterest.equals(
pkg.getPackageName())) {
if (DEBUG_PERMISSIONS) {
Slog.i(TAG, "Unknown permission " + permName
+ " in package " + friendlyName);
}
}
continue;
}
// Cache newImplicitPermissions before modifing permissionsState as for the
// shared uids the original and new state are the same object
if (!origState.hasPermissionState(permName)
&& (pkg.getImplicitPermissions().contains(permName)
|| (permName.equals(Manifest.permission.ACTIVITY_RECOGNITION)))) {
if (pkg.getImplicitPermissions().contains(permName)) {
// If permName is an implicit permission, try to auto-grant
newImplicitPermissions.add(permName);
if (DEBUG_PERMISSIONS) {
Slog.i(TAG, permName + " is newly added for " + friendlyName);
}
} else {
// Special case for Activity Recognition permission. Even if AR
// permission is not an implicit permission we want to add it to the
// list (try to auto-grant it) if the app was installed on a device
// before AR permission was split, regardless of if the app now requests
// the new AR permission or has updated its target SDK and AR is no
// longer implicit to it. This is a compatibility workaround for apps
// when AR permission was split in Q.
// TODO(zhanghai): This calls into SystemConfig, which generally
// shouldn't cause deadlock, but maybe we should keep a cache of the
// split permission list and just eliminate the possibility.
final List<PermissionManager.SplitPermissionInfo> permissionList =
getSplitPermissionInfos();
int numSplitPerms = permissionList.size();
for (int splitPermNum = 0; splitPermNum < numSplitPerms;
splitPermNum++) {
PermissionManager.SplitPermissionInfo sp = permissionList.get(
splitPermNum);
String splitPermName = sp.getSplitPermission();
if (sp.getNewPermissions().contains(permName)
&& origState.isPermissionGranted(splitPermName)) {
legacyActivityRecognitionPermission = splitPermName;
newImplicitPermissions.add(permName);
if (DEBUG_PERMISSIONS) {
Slog.i(TAG, permName + " is newly added for "
+ friendlyName);
}
break;
}
}
}
}
// TODO(b/140256621): The package instant app method has been removed
// as part of work in b/135203078, so this has been commented out in the
// meantime
// Limit ephemeral apps to ephemeral allowed permissions.
// if (/*pkg.isInstantApp()*/ false && !bp.isInstant()) {
// if (DEBUG_PERMISSIONS) {
// Log.i(TAG, "Denying non-ephemeral permission " + bp.getName()
// + " for package " + pkg.getPackageName());
// }
// continue;
// }
if (bp.isRuntimeOnly() && !appSupportsRuntimePermissions) {
if (DEBUG_PERMISSIONS) {
Log.i(TAG, "Denying runtime-only permission " + bp.getName()
+ " for package " + friendlyName);
}
continue;
}
final String perm = bp.getName();
// Keep track of app op permissions.
if (bp.isAppOp()) {
mRegistry.addAppOpPermissionPackage(perm, pkg.getPackageName());
}
boolean shouldGrantNormalPermission = true;
if (bp.isNormal() && !origState.isPermissionGranted(perm)) {
// If this is an existing, non-system package, then
// we can't add any new permissions to it. Runtime
// permissions can be added any time - they are dynamic.
if (!ps.isSystem() && userState.areInstallPermissionsFixed(ps.name)) {
// Except... if this is a permission that was added
// to the platform (note: need to only do this when
// updating the platform).
if (!isNewPlatformPermissionForPackage(perm, pkg)) {
shouldGrantNormalPermission = false;
}
}
}
if (DEBUG_PERMISSIONS) {
Slog.i(TAG, "Considering granting permission " + perm + " to package "
+ pkg.getPackageName());
}
if ((bp.isNormal() && shouldGrantNormalPermission)
|| (bp.isSignature()
&& (!bp.isPrivileged() || CollectionUtils.contains(
isPrivilegedPermissionAllowlisted, permName))
&& (CollectionUtils.contains(shouldGrantSignaturePermission,
permName)
|| (((bp.isPrivileged() && CollectionUtils.contains(
shouldGrantPrivilegedPermissionIfWasGranted,
permName)) || bp.isDevelopment() || bp.isRole())
&& origState.isPermissionGranted(permName))))
|| (bp.isInternal()
&& (!bp.isPrivileged() || CollectionUtils.contains(
isPrivilegedPermissionAllowlisted, permName))
&& (CollectionUtils.contains(shouldGrantInternalPermission,
permName)
|| (((bp.isPrivileged() && CollectionUtils.contains(
shouldGrantPrivilegedPermissionIfWasGranted,
permName)) || bp.isDevelopment() || bp.isRole())
&& origState.isPermissionGranted(permName))))) {
// Grant an install permission.
if (uidState.grantPermission(bp)) {
changedInstallPermission = true;
}
} else if (bp.isRuntime()) {
boolean hardRestricted = bp.isHardRestricted();
boolean softRestricted = bp.isSoftRestricted();
// If permission policy is not ready we don't deal with restricted
// permissions as the policy may allowlist some permissions. Once
// the policy is initialized we would re-evaluate permissions.
final boolean permissionPolicyInitialized =
isPermissionPolicyInitialized.get(userId);
PermissionState origPermState = origState.getPermissionState(perm);
int flags = origPermState != null ? origPermState.getFlags() : 0;
boolean wasChanged = false;
boolean restrictionExempt =
(origState.getPermissionFlags(bp.getName())
& FLAGS_PERMISSION_RESTRICTION_ANY_EXEMPT) != 0;
boolean restrictionApplied = (origState.getPermissionFlags(
bp.getName()) & FLAG_PERMISSION_APPLY_RESTRICTION) != 0;
if (appSupportsRuntimePermissions) {
// If hard restricted we don't allow holding it
if (permissionPolicyInitialized && hardRestricted) {
if (!restrictionExempt) {
if (origPermState != null && origPermState.isGranted()
&& uidState.revokePermission(bp)) {
wasChanged = true;
}
if (!restrictionApplied) {
flags |= FLAG_PERMISSION_APPLY_RESTRICTION;
wasChanged = true;
}
}
// If soft restricted we allow holding in a restricted form
} else if (permissionPolicyInitialized && softRestricted) {
// Regardless if granted set the restriction flag as it
// may affect app treatment based on this permission.
if (!restrictionExempt && !restrictionApplied) {
flags |= FLAG_PERMISSION_APPLY_RESTRICTION;
wasChanged = true;
}
}
// Remove review flag as it is not necessary anymore
if ((flags & FLAG_PERMISSION_REVIEW_REQUIRED) != 0) {
flags &= ~FLAG_PERMISSION_REVIEW_REQUIRED;
wasChanged = true;
}
if ((flags & FLAG_PERMISSION_REVOKED_COMPAT) != 0
&& !isPermissionSplitFromNonRuntime(permName,
pkg.getTargetSdkVersion())) {
flags &= ~FLAG_PERMISSION_REVOKED_COMPAT;
wasChanged = true;
// Hard restricted permissions cannot be held.
} else if (!permissionPolicyInitialized
|| (!hardRestricted || restrictionExempt)) {
if ((origPermState != null && origPermState.isGranted())
|| legacyActivityRecognitionPermission != null) {
if (!uidState.grantPermission(bp)) {
wasChanged = true;
}
}
}
} else {
if (origPermState == null) {
// New permission
if (PLATFORM_PACKAGE_NAME.equals(
bp.getPackageName())) {
if (!bp.isRemoved()) {
flags |= FLAG_PERMISSION_REVIEW_REQUIRED
| FLAG_PERMISSION_REVOKED_COMPAT;
wasChanged = true;
}
}
}
if (!uidState.isPermissionGranted(bp.getName())
&& uidState.grantPermission(bp)) {
wasChanged = true;
}
// If legacy app always grant the permission but if restricted
// and not exempt take a note a restriction should be applied.
if (permissionPolicyInitialized
&& (hardRestricted || softRestricted)
&& !restrictionExempt && !restrictionApplied) {
flags |= FLAG_PERMISSION_APPLY_RESTRICTION;
wasChanged = true;
}
}
// If unrestricted or restriction exempt, don't apply restriction.
if (permissionPolicyInitialized) {
if (!(hardRestricted || softRestricted) || restrictionExempt) {
if (restrictionApplied) {
flags &= ~FLAG_PERMISSION_APPLY_RESTRICTION;
// Dropping restriction on a legacy app implies a review
if (!appSupportsRuntimePermissions) {
flags |= FLAG_PERMISSION_REVIEW_REQUIRED;
}
wasChanged = true;
}
}
}
if (wasChanged) {
updatedUserIds = ArrayUtils.appendInt(updatedUserIds, userId);
}
uidState.updatePermissionFlags(bp, MASK_PERMISSION_FLAGS_ALL,
flags);
} else {
if (DEBUG_PERMISSIONS) {
boolean wasGranted = uidState.isPermissionGranted(bp.getName());
if (wasGranted || bp.isAppOp()) {
Slog.i(TAG, (wasGranted ? "Un-granting" : "Not granting")
+ " permission " + perm
+ " from package " + friendlyName
+ " (protectionLevel=" + bp.getProtectionLevel()
+ " flags=0x"
+ Integer.toHexString(PackageInfoUtils.appInfoFlags(pkg,
ps))
+ ")");
}
}
if (uidState.removePermissionState(bp.getName())) {
changedInstallPermission = true;
}
}
}
if ((changedInstallPermission || replace)
&& !userState.areInstallPermissionsFixed(ps.name)
&& !ps.isSystem() || ps.getPkgState().isUpdatedSystemApp()) {
// This is the first that we have heard about this package, so the
// permissions we have now selected are fixed until explicitly
// changed.
userState.setInstallPermissionsFixed(ps.name, true);
}
updatedUserIds = revokePermissionsNoLongerImplicitLocked(uidState, pkg,
userId, updatedUserIds);
updatedUserIds = setInitialGrantForNewImplicitPermissionsLocked(origState,
uidState, pkg, newImplicitPermissions, userId, updatedUserIds);
}
}
updatedUserIds = checkIfLegacyStorageOpsNeedToBeUpdated(pkg, replace, userIds,
updatedUserIds);
// TODO: Kill UIDs whose GIDs or runtime permissions changed. This might be more important
// for shared users.
// Persist the runtime permissions state for users with changes. If permissions
// were revoked because no app in the shared user declares them we have to
// write synchronously to avoid losing runtime permissions state.
if (callback != null) {
callback.onPermissionUpdated(updatedUserIds, runtimePermissionsRevoked);
}
for (int userId : updatedUserIds) {
notifyRuntimePermissionStateChanged(pkg.getPackageName(), userId);
}
}
/**
* Returns all relevant user ids. This list include the current set of created user ids as well
* as pre-created user ids.
* @return user ids for created users and pre-created users
*/
private int[] getAllUserIds() {
return UserManagerService.getInstance().getUserIdsIncludingPreCreated();
}
/**
* Revoke permissions that are not implicit anymore and that have
* {@link PackageManager#FLAG_PERMISSION_REVOKE_WHEN_REQUESTED} set.
*
* @param ps The state of the permissions of the package
* @param pkg The package that is currently looked at
* @param userIds All user IDs in the system, must be passed in because this method is locked
* @param updatedUserIds a list of user ids that needs to be amended if the permission state
* for a user is changed.
*
* @return The updated value of the {@code updatedUserIds} parameter
*/
@GuardedBy("mLock")
private @NonNull int[] revokePermissionsNoLongerImplicitLocked(@NonNull UidPermissionState ps,
@NonNull AndroidPackage pkg, int userId, @NonNull int[] updatedUserIds) {
String pkgName = pkg.getPackageName();
boolean supportsRuntimePermissions = pkg.getTargetSdkVersion()
>= Build.VERSION_CODES.M;
for (String permission : ps.getGrantedPermissions()) {
if (pkg.getRequestedPermissions().contains(permission)
&& !pkg.getImplicitPermissions().contains(permission)) {
Permission bp = mRegistry.getPermission(permission);
if (bp != null && bp.isRuntime()) {
int flags = ps.getPermissionFlags(permission);
if ((flags & FLAG_PERMISSION_REVOKE_WHEN_REQUESTED) != 0) {
int flagsToRemove = FLAG_PERMISSION_REVOKE_WHEN_REQUESTED;
// We're willing to preserve an implicit "Nearby devices"
// permission grant if this app was already able to interact
// with nearby devices via background location access
boolean preserveGrant = false;
if (ArrayUtils.contains(NEARBY_DEVICES_PERMISSIONS, permission)
&& ps.isPermissionGranted(
android.Manifest.permission.ACCESS_BACKGROUND_LOCATION)
&& (ps.getPermissionFlags(
android.Manifest.permission.ACCESS_BACKGROUND_LOCATION)
& (FLAG_PERMISSION_REVOKE_WHEN_REQUESTED
| FLAG_PERMISSION_REVOKED_COMPAT)) == 0) {
preserveGrant = true;
}
if ((flags & BLOCKING_PERMISSION_FLAGS) == 0
&& supportsRuntimePermissions
&& !preserveGrant) {
if (ps.revokePermission(bp)) {
if (DEBUG_PERMISSIONS) {
Slog.i(TAG, "Revoking runtime permission "
+ permission + " for " + pkgName
+ " as it is now requested");
}
}
flagsToRemove |= USER_PERMISSION_FLAGS;
}
ps.updatePermissionFlags(bp, flagsToRemove, 0);
updatedUserIds = ArrayUtils.appendInt(updatedUserIds, userId);
}
}
}
}
return updatedUserIds;
}
/**
* {@code newPerm} is newly added; Inherit the state from {@code sourcePerms}.
*
* <p>A single new permission can be split off from several source permissions. In this case
* the most leniant state is inherited.
*
* <p>Warning: This does not handle foreground / background permissions
*
* @param sourcePerms The permissions to inherit from
* @param newPerm The permission to inherit to
* @param ps The permission state of the package
* @param pkg The package requesting the permissions
*/
@GuardedBy("mLock")
private void inheritPermissionStateToNewImplicitPermissionLocked(
@NonNull ArraySet<String> sourcePerms, @NonNull String newPerm,
@NonNull UidPermissionState ps, @NonNull AndroidPackage pkg) {
String pkgName = pkg.getPackageName();
boolean isGranted = false;
int flags = 0;
int numSourcePerm = sourcePerms.size();
for (int i = 0; i < numSourcePerm; i++) {
String sourcePerm = sourcePerms.valueAt(i);
if (ps.isPermissionGranted(sourcePerm)) {
if (!isGranted) {
flags = 0;
}
isGranted = true;
flags |= ps.getPermissionFlags(sourcePerm);
} else {
if (!isGranted) {
flags |= ps.getPermissionFlags(sourcePerm);
}
}
}
if (isGranted) {
if (DEBUG_PERMISSIONS) {
Slog.i(TAG, newPerm + " inherits runtime perm grant from " + sourcePerms
+ " for " + pkgName);
}
ps.grantPermission(mRegistry.getPermission(newPerm));
}
// Add permission flags
ps.updatePermissionFlags(mRegistry.getPermission(newPerm), flags, flags);
}
/**
* When the app has requested legacy storage we might need to update
* {@link android.app.AppOpsManager#OP_LEGACY_STORAGE}. Hence force an update in
* {@link com.android.server.policy.PermissionPolicyService#synchronizePackagePermissionsAndAppOpsForUser(Context, String, int)}
*
* @param pkg The package for which the permissions are updated
* @param replace If the app is being replaced
* @param userIds All user IDs in the system, must be passed in because this method is locked
* @param updatedUserIds The ids of the users that already changed.
*
* @return The ids of the users that are changed
*/
private @NonNull int[] checkIfLegacyStorageOpsNeedToBeUpdated(@NonNull AndroidPackage pkg,
boolean replace, @NonNull int[] userIds, @NonNull int[] updatedUserIds) {
if (replace && pkg.isRequestLegacyExternalStorage() && (
pkg.getRequestedPermissions().contains(READ_EXTERNAL_STORAGE)
|| pkg.getRequestedPermissions().contains(WRITE_EXTERNAL_STORAGE))) {
return userIds.clone();
}
return updatedUserIds;
}
/**
* Set the state of a implicit permission that is seen for the first time.
*
* @param origPs The permission state of the package before the split
* @param ps The new permission state
* @param pkg The package the permission belongs to
* @param userId The user ID
* @param updatedUserIds List of users for which the permission state has already been changed
*
* @return List of users for which the permission state has been changed
*/
@GuardedBy("mLock")
private @NonNull int[] setInitialGrantForNewImplicitPermissionsLocked(
@NonNull UidPermissionState origPs, @NonNull UidPermissionState ps,
@NonNull AndroidPackage pkg, @NonNull ArraySet<String> newImplicitPermissions,
@UserIdInt int userId, @NonNull int[] updatedUserIds) {
String pkgName = pkg.getPackageName();
ArrayMap<String, ArraySet<String>> newToSplitPerms = new ArrayMap<>();
final List<PermissionManager.SplitPermissionInfo> permissionList =
getSplitPermissionInfos();
int numSplitPerms = permissionList.size();
for (int splitPermNum = 0; splitPermNum < numSplitPerms; splitPermNum++) {
PermissionManager.SplitPermissionInfo spi = permissionList.get(splitPermNum);
List<String> newPerms = spi.getNewPermissions();
int numNewPerms = newPerms.size();
for (int newPermNum = 0; newPermNum < numNewPerms; newPermNum++) {
String newPerm = newPerms.get(newPermNum);
ArraySet<String> splitPerms = newToSplitPerms.get(newPerm);
if (splitPerms == null) {
splitPerms = new ArraySet<>();
newToSplitPerms.put(newPerm, splitPerms);
}
splitPerms.add(spi.getSplitPermission());
}
}
int numNewImplicitPerms = newImplicitPermissions.size();
for (int newImplicitPermNum = 0; newImplicitPermNum < numNewImplicitPerms;
newImplicitPermNum++) {
String newPerm = newImplicitPermissions.valueAt(newImplicitPermNum);
ArraySet<String> sourcePerms = newToSplitPerms.get(newPerm);
if (sourcePerms != null) {
Permission bp = mRegistry.getPermission(newPerm);
if (bp == null) {
throw new IllegalStateException("Unknown new permission in split permission: "
+ newPerm);
}
if (bp.isRuntime()) {
if (!newPerm.equals(Manifest.permission.ACTIVITY_RECOGNITION)) {
ps.updatePermissionFlags(bp,
FLAG_PERMISSION_REVOKE_WHEN_REQUESTED,
FLAG_PERMISSION_REVOKE_WHEN_REQUESTED);
}
updatedUserIds = ArrayUtils.appendInt(updatedUserIds, userId);
if (!origPs.hasPermissionState(sourcePerms)) {
boolean inheritsFromInstallPerm = false;
for (int sourcePermNum = 0; sourcePermNum < sourcePerms.size();
sourcePermNum++) {
final String sourcePerm = sourcePerms.valueAt(sourcePermNum);
Permission sourceBp = mRegistry.getPermission(sourcePerm);
if (sourceBp == null) {
throw new IllegalStateException("Unknown source permission in split"
+ " permission: " + sourcePerm);
}
if (!sourceBp.isRuntime()) {
inheritsFromInstallPerm = true;
break;
}
}
if (!inheritsFromInstallPerm) {
// Both permissions are new so nothing to inherit.
if (DEBUG_PERMISSIONS) {
Slog.i(TAG, newPerm + " does not inherit from " + sourcePerms
+ " for " + pkgName + " as split permission is also new");
}
continue;
}
}
// Inherit from new install or existing runtime permissions
inheritPermissionStateToNewImplicitPermissionLocked(sourcePerms, newPerm, ps,
pkg);
}
}
}
return updatedUserIds;
}
@NonNull
@Override
public List<SplitPermissionInfoParcelable> getSplitPermissions() {
return PermissionManager.splitPermissionInfoListToParcelableList(getSplitPermissionInfos());
}
@NonNull
private List<PermissionManager.SplitPermissionInfo> getSplitPermissionInfos() {
return SystemConfig.getInstance().getSplitPermissions();
}
@NonNull
private OneTimePermissionUserManager getOneTimePermissionUserManager(@UserIdInt int userId) {
OneTimePermissionUserManager oneTimePermissionUserManager;
synchronized (mLock) {
oneTimePermissionUserManager = mOneTimePermissionUserManagers.get(userId);
if (oneTimePermissionUserManager != null) {
return oneTimePermissionUserManager;
}
}
// We cannot create a new instance of OneTimePermissionUserManager while holding our own
// lock, which may lead to a deadlock with the package manager lock. So we do it in a
// retry-like way, and just discard the newly created instance if someone else managed to be
// a little bit faster than us when we dropped our own lock.
final OneTimePermissionUserManager newOneTimePermissionUserManager =
new OneTimePermissionUserManager(mContext.createContextAsUser(UserHandle.of(userId),
/*flags*/ 0));
synchronized (mLock) {
oneTimePermissionUserManager = mOneTimePermissionUserManagers.get(userId);
if (oneTimePermissionUserManager != null) {
return oneTimePermissionUserManager;
}
oneTimePermissionUserManager = newOneTimePermissionUserManager;
mOneTimePermissionUserManagers.put(userId, oneTimePermissionUserManager);
}
oneTimePermissionUserManager.registerUninstallListener();
return oneTimePermissionUserManager;
}
@Override
public void startOneTimePermissionSession(String packageName, @UserIdInt int userId,
long timeoutMillis, int importanceToResetTimer, int importanceToKeepSessionAlive) {
mContext.enforceCallingPermission(Manifest.permission.MANAGE_ONE_TIME_PERMISSION_SESSIONS,
"Must hold " + Manifest.permission.MANAGE_ONE_TIME_PERMISSION_SESSIONS
+ " to register permissions as one time.");
Objects.requireNonNull(packageName);
final long token = Binder.clearCallingIdentity();
try {
getOneTimePermissionUserManager(userId).startPackageOneTimeSession(packageName,
timeoutMillis, importanceToResetTimer, importanceToKeepSessionAlive);
} finally {
Binder.restoreCallingIdentity(token);
}
}
@Override
public void stopOneTimePermissionSession(String packageName, @UserIdInt int userId) {
mContext.enforceCallingPermission(Manifest.permission.MANAGE_ONE_TIME_PERMISSION_SESSIONS,
"Must hold " + Manifest.permission.MANAGE_ONE_TIME_PERMISSION_SESSIONS
+ " to remove permissions as one time.");
Objects.requireNonNull(packageName);
final long token = Binder.clearCallingIdentity();
try {
getOneTimePermissionUserManager(userId).stopPackageOneTimeSession(packageName);
} finally {
Binder.restoreCallingIdentity(token);
}
}
@Override
public void registerAttributionSource(@NonNull AttributionSourceState source) {
mAttributionSourceRegistry
.registerAttributionSource(new AttributionSource(source));
}
@Override
public boolean isRegisteredAttributionSource(@NonNull AttributionSourceState source) {
return mAttributionSourceRegistry
.isRegisteredAttributionSource(new AttributionSource(source));
}
@Override
public List<String> getAutoRevokeExemptionRequestedPackages(int userId) {
return getPackagesWithAutoRevokePolicy(AUTO_REVOKE_DISCOURAGED, userId);
}
@Override
public List<String> getAutoRevokeExemptionGrantedPackages(int userId) {
return getPackagesWithAutoRevokePolicy(AUTO_REVOKE_DISALLOWED, userId);
}
@NonNull
private List<String> getPackagesWithAutoRevokePolicy(int autoRevokePolicy, int userId) {
mContext.enforceCallingPermission(Manifest.permission.ADJUST_RUNTIME_PERMISSIONS_POLICY,
"Must hold " + Manifest.permission.ADJUST_RUNTIME_PERMISSIONS_POLICY);
List<String> result = new ArrayList<>();
mPackageManagerInt.forEachInstalledPackage(pkg -> {
if (pkg.getAutoRevokePermissions() == autoRevokePolicy) {
result.add(pkg.getPackageName());
}
}, userId);
return result;
}
private static boolean isNewPlatformPermissionForPackage(String perm, AndroidPackage pkg) {
boolean allowed = false;
final int NP = PackageParser.NEW_PERMISSIONS.length;
for (int ip=0; ip<NP; ip++) {
final PackageParser.NewPermissionInfo npi
= PackageParser.NEW_PERMISSIONS[ip];
if (npi.name.equals(perm)
&& pkg.getTargetSdkVersion() < npi.sdkVersion) {
allowed = true;
Log.i(TAG, "Auto-granting " + perm + " to old pkg "
+ pkg.getPackageName());
break;
}
}
return allowed;
}
private boolean checkPrivilegedPermissionAllowlist(@NonNull AndroidPackage pkg,
@NonNull PackageSetting packageSetting, @NonNull Permission permission) {
if (RoSystemProperties.CONTROL_PRIVAPP_PERMISSIONS_DISABLE) {
return true;
}
final String packageName = pkg.getPackageName();
if (Objects.equals(packageName, PLATFORM_PACKAGE_NAME)) {
return true;
}
if (!pkg.isPrivileged()) {
return true;
}
if (!mPrivilegedPermissionAllowlistSourcePackageNames
.contains(permission.getPackageName())) {
return true;
}
final String permissionName = permission.getName();
if (isInSystemConfigPrivAppPermissions(pkg, permissionName)) {
return true;
}
if (isInSystemConfigPrivAppDenyPermissions(pkg, permissionName)) {
return false;
}
// Updated system apps do not need to be allowlisted
if (packageSetting.getPkgState().isUpdatedSystemApp()) {
// Let shouldGrantPermissionByProtectionFlags() decide whether the privileged permission
// can be granted, because an updated system app may be in a shared UID, and in case a
// new privileged permission is requested by the updated system app but not the factory
// app, although this app and permission combination isn't in the allowlist and can't
// get the permission this way, other apps in the shared UID may still get it. A proper
// fix for this would be to perform the reconciliation by UID, but for now let's keep
// the old workaround working, which is to keep granted privileged permissions still
// granted.
return true;
}
// Only enforce the allowlist on boot
if (!mSystemReady) {
final ApexManager apexManager = ApexManager.getInstance();
final String containingApexPackageName =
apexManager.getActiveApexPackageNameContainingPackage(packageName);
final boolean isInUpdatedApex = containingApexPackageName != null
&& !apexManager.isFactory(apexManager.getPackageInfo(containingApexPackageName,
MATCH_ACTIVE_PACKAGE));
// Apps that are in updated apexs' do not need to be allowlisted
if (!isInUpdatedApex) {
Slog.w(TAG, "Privileged permission " + permissionName + " for package "
+ packageName + " (" + pkg.getPath()
+ ") not in privapp-permissions allowlist");
if (RoSystemProperties.CONTROL_PRIVAPP_PERMISSIONS_ENFORCE) {
synchronized (mLock) {
if (mPrivappPermissionsViolations == null) {
mPrivappPermissionsViolations = new ArraySet<>();
}
mPrivappPermissionsViolations.add(packageName + " (" + pkg.getPath() + "): "
+ permissionName);
}
}
}
}
return !RoSystemProperties.CONTROL_PRIVAPP_PERMISSIONS_ENFORCE;
}
private boolean isInSystemConfigPrivAppPermissions(@NonNull AndroidPackage pkg,
@NonNull String permission) {
final SystemConfig systemConfig = SystemConfig.getInstance();
final Set<String> permissions;
if (pkg.isVendor()) {
permissions = systemConfig.getVendorPrivAppPermissions(pkg.getPackageName());
} else if (pkg.isProduct()) {
permissions = systemConfig.getProductPrivAppPermissions(pkg.getPackageName());
} else if (pkg.isSystemExt()) {
permissions = systemConfig.getSystemExtPrivAppPermissions(pkg.getPackageName());
} else {
permissions = systemConfig.getPrivAppPermissions(pkg.getPackageName());
}
return CollectionUtils.contains(permissions, permission);
}
private boolean isInSystemConfigPrivAppDenyPermissions(@NonNull AndroidPackage pkg,
@NonNull String permission) {
final SystemConfig systemConfig = SystemConfig.getInstance();
final Set<String> permissions;
if (pkg.isVendor()) {
permissions = systemConfig.getVendorPrivAppDenyPermissions(pkg.getPackageName());
} else if (pkg.isProduct()) {
permissions = systemConfig.getProductPrivAppDenyPermissions(pkg.getPackageName());
} else if (pkg.isSystemExt()) {
permissions = systemConfig.getSystemExtPrivAppDenyPermissions(pkg.getPackageName());
} else {
permissions = systemConfig.getPrivAppDenyPermissions(pkg.getPackageName());
}
return CollectionUtils.contains(permissions, permission);
}
private boolean shouldGrantPermissionBySignature(@NonNull AndroidPackage pkg,
@NonNull Permission bp) {
// expect single system package
String systemPackageName = ArrayUtils.firstOrNull(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_SYSTEM, UserHandle.USER_SYSTEM));
final AndroidPackage systemPackage =
mPackageManagerInt.getPackage(systemPackageName);
// check if the package is allow to use this signature permission. A package is allowed to
// use a signature permission if:
// - it has the same set of signing certificates as the source package
// - or its signing certificate was rotated from the source package's certificate
// - or its signing certificate is a previous signing certificate of the defining
// package, and the defining package still trusts the old certificate for permissions
// - or it shares a common signing certificate in its lineage with the defining package,
// and the defining package still trusts the old certificate for permissions
// - or it shares the above relationships with the system package
final PackageParser.SigningDetails sourceSigningDetails =
getSourcePackageSigningDetails(bp);
return sourceSigningDetails.hasCommonSignerWithCapability(
pkg.getSigningDetails(),
PackageParser.SigningDetails.CertCapabilities.PERMISSION)
|| pkg.getSigningDetails().hasAncestorOrSelf(systemPackage.getSigningDetails())
|| systemPackage.getSigningDetails().checkCapability(
pkg.getSigningDetails(),
PackageParser.SigningDetails.CertCapabilities.PERMISSION);
}
private boolean shouldGrantPermissionByProtectionFlags(@NonNull AndroidPackage pkg,
@NonNull PackageSetting pkgSetting, @NonNull Permission bp,
@NonNull ArraySet<String> shouldGrantPrivilegedPermissionIfWasGranted) {
boolean allowed = false;
final boolean isPrivilegedPermission = bp.isPrivileged();
final boolean isOemPermission = bp.isOem();
if (!allowed && (isPrivilegedPermission || isOemPermission) && pkg.isSystem()) {
final String permissionName = bp.getName();
// For updated system applications, a privileged/oem permission
// is granted only if it had been defined by the original application.
if (pkgSetting.getPkgState().isUpdatedSystemApp()) {
final PackageSetting disabledPs = mPackageManagerInt
.getDisabledSystemPackage(pkg.getPackageName());
final AndroidPackage disabledPkg = disabledPs == null ? null : disabledPs.pkg;
if (disabledPkg != null
&& ((isPrivilegedPermission && disabledPkg.isPrivileged())
|| (isOemPermission && canGrantOemPermission(disabledPkg,
permissionName)))) {
if (disabledPkg.getRequestedPermissions().contains(permissionName)) {
allowed = true;
} else {
// If the original was granted this permission, we take
// that grant decision as read and propagate it to the
// update.
shouldGrantPrivilegedPermissionIfWasGranted.add(permissionName);
}
}
} else {
allowed = (isPrivilegedPermission && pkg.isPrivileged())
|| (isOemPermission && canGrantOemPermission(pkg, permissionName));
}
// In any case, don't grant a privileged permission to privileged vendor apps, if
// the permission's protectionLevel does not have the extra 'vendorPrivileged'
// flag.
if (allowed && isPrivilegedPermission && !bp.isVendorPrivileged() && pkg.isVendor()) {
Slog.w(TAG, "Permission " + permissionName
+ " cannot be granted to privileged vendor apk " + pkg.getPackageName()
+ " because it isn't a 'vendorPrivileged' permission.");
allowed = false;
}
}
if (!allowed && bp.isPre23() && pkg.getTargetSdkVersion() < Build.VERSION_CODES.M) {
// If this was a previously normal/dangerous permission that got moved
// to a system permission as part of the runtime permission redesign, then
// we still want to blindly grant it to old apps.
allowed = true;
}
// TODO (moltmann): The installer now shares the platforms signature. Hence it does not
// need a separate flag anymore. Hence we need to check which
// permissions are needed by the permission controller
if (!allowed && bp.isInstaller()
&& (ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_INSTALLER, UserHandle.USER_SYSTEM),
pkg.getPackageName()) || ArrayUtils.contains(
mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_PERMISSION_CONTROLLER,
UserHandle.USER_SYSTEM), pkg.getPackageName()))) {
// If this permission is to be granted to the system installer and
// this app is an installer, then it gets the permission.
allowed = true;
}
if (!allowed && bp.isVerifier()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_VERIFIER, UserHandle.USER_SYSTEM),
pkg.getPackageName())) {
// If this permission is to be granted to the system verifier and
// this app is a verifier, then it gets the permission.
allowed = true;
}
if (!allowed && bp.isPreInstalled()
&& pkg.isSystem()) {
// Any pre-installed system app is allowed to get this permission.
allowed = true;
}
if (!allowed && bp.isKnownSigner()) {
// If the permission is to be granted to a known signer then check if any of this
// app's signing certificates are in the trusted certificate digest Set.
allowed = pkg.getSigningDetails().hasAncestorOrSelfWithDigest(bp.getKnownCerts());
}
// Deferred to be checked under permission data lock inside restorePermissionState().
//if (!allowed && bp.isDevelopment()) {
// // For development permissions, a development permission
// // is granted only if it was already granted.
// allowed = origPermissions.isPermissionGranted(permissionName);
//}
if (!allowed && bp.isSetup()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_SETUP_WIZARD, UserHandle.USER_SYSTEM),
pkg.getPackageName())) {
// If this permission is to be granted to the system setup wizard and
// this app is a setup wizard, then it gets the permission.
allowed = true;
}
if (!allowed && bp.isSystemTextClassifier()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_SYSTEM_TEXT_CLASSIFIER,
UserHandle.USER_SYSTEM), pkg.getPackageName())) {
// Special permissions for the system default text classifier.
allowed = true;
}
if (!allowed && bp.isConfigurator()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_CONFIGURATOR,
UserHandle.USER_SYSTEM), pkg.getPackageName())) {
// Special permissions for the device configurator.
allowed = true;
}
if (!allowed && bp.isDocumenter()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_DOCUMENTER, UserHandle.USER_SYSTEM),
pkg.getPackageName())) {
// If this permission is to be granted to the documenter and
// this app is the documenter, then it gets the permission.
allowed = true;
}
if (!allowed && bp.isIncidentReportApprover()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_INCIDENT_REPORT_APPROVER,
UserHandle.USER_SYSTEM), pkg.getPackageName())) {
// If this permission is to be granted to the incident report approver and
// this app is the incident report approver, then it gets the permission.
allowed = true;
}
if (!allowed && bp.isAppPredictor()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_APP_PREDICTOR, UserHandle.USER_SYSTEM),
pkg.getPackageName())) {
// Special permissions for the system app predictor.
allowed = true;
}
if (!allowed && bp.isCompanion()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_COMPANION, UserHandle.USER_SYSTEM),
pkg.getPackageName())) {
// Special permissions for the system companion device manager.
allowed = true;
}
if (!allowed && bp.isRetailDemo()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_RETAIL_DEMO, UserHandle.USER_SYSTEM),
pkg.getPackageName()) && isProfileOwner(pkg.getUid())) {
// Special permission granted only to the OEM specified retail demo app
allowed = true;
}
if (!allowed && bp.isRecents()
&& ArrayUtils.contains(mPackageManagerInt.getKnownPackageNames(
PackageManagerInternal.PACKAGE_RECENTS, UserHandle.USER_SYSTEM),
pkg.getPackageName())) {
// Special permission for the recents app.
allowed = true;
}
return allowed;
}
@NonNull
private PackageParser.SigningDetails getSourcePackageSigningDetails(
@NonNull Permission bp) {
final PackageSetting ps = getSourcePackageSetting(bp);
if (ps == null) {
return PackageParser.SigningDetails.UNKNOWN;
}
return ps.getSigningDetails();
}
@Nullable
private PackageSetting getSourcePackageSetting(@NonNull Permission bp) {
final String sourcePackageName = bp.getPackageName();
return mPackageManagerInt.getPackageSetting(sourcePackageName);
}
private static boolean canGrantOemPermission(AndroidPackage pkg, String permission) {
if (!pkg.isOem()) {
return false;
}
// all oem permissions must explicitly be granted or denied
final Boolean granted =
SystemConfig.getInstance().getOemPermissions(pkg.getPackageName()).get(permission);
if (granted == null) {
throw new IllegalStateException("OEM permission" + permission + " requested by package "
+ pkg.getPackageName() + " must be explicitly declared granted or not");
}
return Boolean.TRUE == granted;
}
private static boolean isProfileOwner(int uid) {
DevicePolicyManagerInternal dpmInternal =
LocalServices.getService(DevicePolicyManagerInternal.class);
//TODO(b/169395065) Figure out if this flow makes sense in Device Owner mode.
if (dpmInternal != null) {
return dpmInternal.isActiveProfileOwner(uid) || dpmInternal.isActiveDeviceOwner(uid);
}
return false;
}
private boolean isPermissionsReviewRequiredInternal(@NonNull String packageName,
@UserIdInt int userId) {
final AndroidPackage pkg = mPackageManagerInt.getPackage(packageName);
if (pkg == null) {
return false;
}
// Permission review applies only to apps not supporting the new permission model.
if (pkg.getTargetSdkVersion() >= Build.VERSION_CODES.M) {
return false;
}
// Legacy apps have the permission and get user consent on launch.
synchronized (mLock) {
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + pkg.getPackageName() + " and user "
+ userId);
return false;
}
return uidState.isPermissionsReviewRequired();
}
}
private void grantRequestedRuntimePermissionsInternal(@NonNull AndroidPackage pkg,
@Nullable List<String> permissions, int userId) {
final int immutableFlags = PackageManager.FLAG_PERMISSION_SYSTEM_FIXED
| PackageManager.FLAG_PERMISSION_POLICY_FIXED;
final int compatFlags = PackageManager.FLAG_PERMISSION_REVIEW_REQUIRED
| PackageManager.FLAG_PERMISSION_REVOKED_COMPAT;
final boolean supportsRuntimePermissions = pkg.getTargetSdkVersion()
>= Build.VERSION_CODES.M;
final boolean instantApp = mPackageManagerInt.isInstantApp(pkg.getPackageName(), userId);
final int myUid = Process.myUid();
for (String permission : pkg.getRequestedPermissions()) {
final boolean shouldGrantPermission;
synchronized (mLock) {
final Permission bp = mRegistry.getPermission(permission);
shouldGrantPermission = bp != null && (bp.isRuntime() || bp.isDevelopment())
&& (!instantApp || bp.isInstant())
&& (supportsRuntimePermissions || !bp.isRuntimeOnly())
&& (permissions == null || permissions.contains(permission));
}
if (shouldGrantPermission) {
final int flags = getPermissionFlagsInternal(pkg.getPackageName(), permission,
myUid, userId);
if (supportsRuntimePermissions) {
// Installer cannot change immutable permissions.
if ((flags & immutableFlags) == 0) {
grantRuntimePermissionInternal(pkg.getPackageName(), permission, false,
myUid, userId, mDefaultPermissionCallback);
}
} else {
// In permission review mode we clear the review flag and the revoked compat
// flag when we are asked to install the app with all permissions granted.
if ((flags & compatFlags) != 0) {
updatePermissionFlagsInternal(pkg.getPackageName(), permission, compatFlags,
0, myUid, userId, false, mDefaultPermissionCallback);
}
}
}
}
}
private void setAllowlistedRestrictedPermissionsInternal(@NonNull AndroidPackage pkg,
@Nullable List<String> permissions, @PermissionWhitelistFlags int allowlistFlags,
@UserIdInt int userId) {
ArraySet<String> oldGrantedRestrictedPermissions = null;
boolean updatePermissions = false;
final int permissionCount = pkg.getRequestedPermissions().size();
final int myUid = Process.myUid();
for (int j = 0; j < permissionCount; j++) {
final String permissionName = pkg.getRequestedPermissions().get(j);
final boolean isGranted;
synchronized (mLock) {
final Permission bp = mRegistry.getPermission(permissionName);
if (bp == null || !bp.isHardOrSoftRestricted()) {
continue;
}
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + pkg.getPackageName()
+ " and user " + userId);
continue;
}
isGranted = uidState.isPermissionGranted(permissionName);
}
if (isGranted) {
if (oldGrantedRestrictedPermissions == null) {
oldGrantedRestrictedPermissions = new ArraySet<>();
}
oldGrantedRestrictedPermissions.add(permissionName);
}
final int oldFlags = getPermissionFlagsInternal(pkg.getPackageName(), permissionName,
myUid, userId);
int newFlags = oldFlags;
int mask = 0;
int allowlistFlagsCopy = allowlistFlags;
while (allowlistFlagsCopy != 0) {
final int flag = 1 << Integer.numberOfTrailingZeros(allowlistFlagsCopy);
allowlistFlagsCopy &= ~flag;
switch (flag) {
case FLAG_PERMISSION_WHITELIST_SYSTEM: {
mask |= FLAG_PERMISSION_RESTRICTION_SYSTEM_EXEMPT;
if (permissions != null && permissions.contains(permissionName)) {
newFlags |= FLAG_PERMISSION_RESTRICTION_SYSTEM_EXEMPT;
} else {
newFlags &= ~FLAG_PERMISSION_RESTRICTION_SYSTEM_EXEMPT;
}
}
break;
case FLAG_PERMISSION_WHITELIST_UPGRADE: {
mask |= FLAG_PERMISSION_RESTRICTION_UPGRADE_EXEMPT;
if (permissions != null && permissions.contains(permissionName)) {
newFlags |= FLAG_PERMISSION_RESTRICTION_UPGRADE_EXEMPT;
} else {
newFlags &= ~FLAG_PERMISSION_RESTRICTION_UPGRADE_EXEMPT;
}
}
break;
case FLAG_PERMISSION_WHITELIST_INSTALLER: {
mask |= FLAG_PERMISSION_RESTRICTION_INSTALLER_EXEMPT;
if (permissions != null && permissions.contains(permissionName)) {
newFlags |= FLAG_PERMISSION_RESTRICTION_INSTALLER_EXEMPT;
} else {
newFlags &= ~FLAG_PERMISSION_RESTRICTION_INSTALLER_EXEMPT;
}
}
break;
}
}
if (oldFlags == newFlags) {
continue;
}
updatePermissions = true;
final boolean wasAllowlisted = (oldFlags
& (PackageManager.FLAGS_PERMISSION_RESTRICTION_ANY_EXEMPT)) != 0;
final boolean isAllowlisted = (newFlags
& (PackageManager.FLAGS_PERMISSION_RESTRICTION_ANY_EXEMPT)) != 0;
// If the permission is policy fixed as granted but it is no longer
// on any of the allowlists we need to clear the policy fixed flag
// as allowlisting trumps policy i.e. policy cannot grant a non
// grantable permission.
if ((oldFlags & PackageManager.FLAG_PERMISSION_POLICY_FIXED) != 0) {
if (!isAllowlisted && isGranted) {
mask |= PackageManager.FLAG_PERMISSION_POLICY_FIXED;
newFlags &= ~PackageManager.FLAG_PERMISSION_POLICY_FIXED;
}
}
// If we are allowlisting an app that does not support runtime permissions
// we need to make sure it goes through the permission review UI at launch.
if (pkg.getTargetSdkVersion() < Build.VERSION_CODES.M
&& !wasAllowlisted && isAllowlisted) {
mask |= PackageManager.FLAG_PERMISSION_REVIEW_REQUIRED;
newFlags |= PackageManager.FLAG_PERMISSION_REVIEW_REQUIRED;
}
updatePermissionFlagsInternal(pkg.getPackageName(), permissionName, mask, newFlags,
myUid, userId, false, null /*callback*/);
}
if (updatePermissions) {
// Update permission of this app to take into account the new allowlist state.
restorePermissionState(pkg, false, pkg.getPackageName(), mDefaultPermissionCallback,
userId);
// If this resulted in losing a permission we need to kill the app.
if (oldGrantedRestrictedPermissions == null) {
return;
}
final int oldGrantedCount = oldGrantedRestrictedPermissions.size();
for (int j = 0; j < oldGrantedCount; j++) {
final String permissionName = oldGrantedRestrictedPermissions.valueAt(j);
// Sometimes we create a new permission state instance during update.
final boolean isGranted;
synchronized (mLock) {
final UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + pkg.getPackageName()
+ " and user " + userId);
continue;
}
isGranted = uidState.isPermissionGranted(permissionName);
}
if (!isGranted) {
mDefaultPermissionCallback.onPermissionRevoked(pkg.getUid(), userId, null);
break;
}
}
}
}
@UserIdInt
private int revokeSharedUserPermissionsForDeletedPackageInternal(
@Nullable AndroidPackage pkg, @NonNull List<AndroidPackage> sharedUserPkgs,
@UserIdInt int userId) {
if (pkg == null) {
Slog.i(TAG, "Trying to update info for null package. Just ignoring");
return UserHandle.USER_NULL;
}
// No shared user packages
if (sharedUserPkgs.isEmpty()) {
return UserHandle.USER_NULL;
}
int affectedUserId = UserHandle.USER_NULL;
// Update permissions
for (String eachPerm : pkg.getRequestedPermissions()) {
// Check if another package in the shared user needs the permission.
boolean used = false;
for (AndroidPackage sharedUserpkg : sharedUserPkgs) {
if (sharedUserpkg != null
&& !sharedUserpkg.getPackageName().equals(pkg.getPackageName())
&& sharedUserpkg.getRequestedPermissions().contains(eachPerm)) {
used = true;
break;
}
}
if (used) {
continue;
}
PackageSetting disabledPs = mPackageManagerInt.getDisabledSystemPackage(
pkg.getPackageName());
// If the package is shadowing is a disabled system package,
// do not drop permissions that the shadowed package requests.
if (disabledPs != null) {
boolean reqByDisabledSysPkg = false;
for (String permission : disabledPs.pkg.getRequestedPermissions()) {
if (permission.equals(eachPerm)) {
reqByDisabledSysPkg = true;
break;
}
}
if (reqByDisabledSysPkg) {
continue;
}
}
synchronized (mLock) {
UidPermissionState uidState = getUidStateLocked(pkg, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for " + pkg.getPackageName()
+ " and user " + userId);
continue;
}
Permission bp = mRegistry.getPermission(eachPerm);
if (bp == null) {
continue;
}
// TODO(zhanghai): Why are we only killing the UID when GIDs changed, instead of any
// permission change?
if (uidState.removePermissionState(bp.getName()) && bp.hasGids()) {
affectedUserId = userId;
}
}
}
return affectedUserId;
}
@GuardedBy("mLock")
private boolean revokeUnusedSharedUserPermissionsLocked(
List<AndroidPackage> pkgList, UidPermissionState uidState) {
// Collect all used permissions in the UID
final ArraySet<String> usedPermissions = new ArraySet<>();
if (pkgList == null || pkgList.size() == 0) {
return false;
}
for (AndroidPackage pkg : pkgList) {
if (pkg.getRequestedPermissions().isEmpty()) {
continue;
}
final int requestedPermCount = pkg.getRequestedPermissions().size();
for (int j = 0; j < requestedPermCount; j++) {
String permission = pkg.getRequestedPermissions().get(j);
Permission bp = mRegistry.getPermission(permission);
if (bp != null) {
usedPermissions.add(permission);
}
}
}
boolean runtimePermissionChanged = false;
// Prune permissions
final List<PermissionState> permissionStates = uidState.getPermissionStates();
final int permissionStatesSize = permissionStates.size();
for (int i = permissionStatesSize - 1; i >= 0; i--) {
PermissionState permissionState = permissionStates.get(i);
if (!usedPermissions.contains(permissionState.getName())) {
Permission bp = mRegistry.getPermission(permissionState.getName());
if (bp != null) {
if (uidState.removePermissionState(bp.getName()) && bp.isRuntime()) {
runtimePermissionChanged = true;
}
}
}
}
return runtimePermissionChanged;
}
/**
* Update permissions when a package changed.
*
* <p><ol>
* <li>Reconsider the ownership of permission</li>
* <li>Update the state (grant, flags) of the permissions</li>
* </ol>
*
* @param packageName The package that is updated
* @param pkg The package that is updated, or {@code null} if package is deleted
*/
private void updatePermissions(@NonNull String packageName, @Nullable AndroidPackage pkg) {
// If the package is being deleted, update the permissions of all the apps
final int flags =
(pkg == null ? UPDATE_PERMISSIONS_ALL | UPDATE_PERMISSIONS_REPLACE_PKG
: UPDATE_PERMISSIONS_REPLACE_PKG);
updatePermissions(
packageName, pkg, getVolumeUuidForPackage(pkg), flags, mDefaultPermissionCallback);
}
/**
* Update all permissions for all apps.
*
* <p><ol>
* <li>Reconsider the ownership of permission</li>
* <li>Update the state (grant, flags) of the permissions</li>
* </ol>
*
* @param volumeUuid The volume UUID of the packages to be updated
* @param fingerprintChanged whether the current build fingerprint is different from what it was
* when this volume was last mounted
*/
private void updateAllPermissions(@NonNull String volumeUuid, boolean fingerprintChanged) {
PackageManager.corkPackageInfoCache(); // Prevent invalidation storm
try {
final int flags = UPDATE_PERMISSIONS_ALL |
(fingerprintChanged
? UPDATE_PERMISSIONS_REPLACE_PKG | UPDATE_PERMISSIONS_REPLACE_ALL
: 0);
updatePermissions(null, null, volumeUuid, flags, mDefaultPermissionCallback);
} finally {
PackageManager.uncorkPackageInfoCache();
}
}
/**
* Update all packages on the volume, <u>beside</u> the changing package. If the changing
* package is set too, all packages are updated.
*/
private static final int UPDATE_PERMISSIONS_ALL = 1 << 0;
/** The changing package is replaced. Requires the changing package to be set */
private static final int UPDATE_PERMISSIONS_REPLACE_PKG = 1 << 1;
/**
* Schedule all packages <u>beside</u> the changing package for replacement. Requires
* UPDATE_PERMISSIONS_ALL to be set
*/
private static final int UPDATE_PERMISSIONS_REPLACE_ALL = 1 << 2;
@IntDef(flag = true, prefix = { "UPDATE_PERMISSIONS_" }, value = {
UPDATE_PERMISSIONS_ALL, UPDATE_PERMISSIONS_REPLACE_PKG,
UPDATE_PERMISSIONS_REPLACE_ALL })
@Retention(RetentionPolicy.SOURCE)
private @interface UpdatePermissionFlags {}
/**
* Update permissions when packages changed.
*
* <p><ol>
* <li>Reconsider the ownership of permission</li>
* <li>Update the state (grant, flags) of the permissions</li>
* </ol>
*
* <p>Meaning of combination of package parameters:
* <table>
* <tr><th></th><th>changingPkgName != null</th><th>changingPkgName == null</th></tr>
* <tr><th>changingPkg != null</th><td>package is updated</td><td>invalid</td></tr>
* <tr><th>changingPkg == null</th><td>package is deleted</td><td>all packages are
* updated</td></tr>
* </table>
*
* @param changingPkgName The package that is updated, or {@code null} if all packages should be
* updated
* @param changingPkg The package that is updated, or {@code null} if all packages should be
* updated or package is deleted
* @param replaceVolumeUuid The volume of the packages to be updated are on, {@code null} for
* all volumes
* @param flags Control permission for which apps should be updated
* @param callback Callback to call after permission changes
*/
private void updatePermissions(final @Nullable String changingPkgName,
final @Nullable AndroidPackage changingPkg,
final @Nullable String replaceVolumeUuid,
@UpdatePermissionFlags int flags,
final @Nullable PermissionCallback callback) {
// TODO: Most of the methods exposing BasePermission internals [source package name,
// etc..] shouldn't be needed. Instead, when we've parsed a permission that doesn't
// have package settings, we should make note of it elsewhere [map between
// source package name and BasePermission] and cycle through that here. Then we
// define a single method on BasePermission that takes a PackageSetting, changing
// package name and a package.
// NOTE: With this approach, we also don't need to tree trees differently than
// normal permissions. Today, we need two separate loops because these BasePermission
// objects are stored separately.
// Make sure there are no dangling permission trees.
boolean permissionTreesSourcePackageChanged = updatePermissionTreeSourcePackage(
changingPkgName, changingPkg);
// Make sure all dynamic permissions have been assigned to a package,
// and make sure there are no dangling permissions.
boolean permissionSourcePackageChanged = updatePermissionSourcePackage(changingPkgName,
changingPkg, callback);
if (permissionTreesSourcePackageChanged | permissionSourcePackageChanged) {
// Permission ownership has changed. This e.g. changes which packages can get signature
// permissions
Slog.i(TAG, "Permission ownership changed. Updating all permissions.");
flags |= UPDATE_PERMISSIONS_ALL;
}
Trace.traceBegin(TRACE_TAG_PACKAGE_MANAGER, "restorePermissionState");
// Now update the permissions for all packages.
if ((flags & UPDATE_PERMISSIONS_ALL) != 0) {
final boolean replaceAll = ((flags & UPDATE_PERMISSIONS_REPLACE_ALL) != 0);
mPackageManagerInt.forEachPackage((AndroidPackage pkg) -> {
if (pkg == changingPkg) {
return;
}
// Only replace for packages on requested volume
final String volumeUuid = getVolumeUuidForPackage(pkg);
final boolean replace = replaceAll && Objects.equals(replaceVolumeUuid, volumeUuid);
restorePermissionState(pkg, replace, changingPkgName, callback,
UserHandle.USER_ALL);
});
}
if (changingPkg != null) {
// Only replace for packages on requested volume
final String volumeUuid = getVolumeUuidForPackage(changingPkg);
final boolean replace = ((flags & UPDATE_PERMISSIONS_REPLACE_PKG) != 0)
&& Objects.equals(replaceVolumeUuid, volumeUuid);
restorePermissionState(changingPkg, replace, changingPkgName, callback,
UserHandle.USER_ALL);
}
Trace.traceEnd(TRACE_TAG_PACKAGE_MANAGER);
}
/**
* Update which app declares a permission.
*
* <p>Possible parameter combinations
* <table>
* <tr><th></th><th>packageName != null</th><th>packageName == null</th></tr>
* <tr><th>pkg != null</th><td>package is updated</td><td>invalid</td></tr>
* <tr><th>pkg == null</th><td>package is deleted</td><td>all packages are updated</td></tr>
* </table>
*
* @param packageName The package that is updated, or {@code null} if all packages should be
* updated
* @param pkg The package that is updated, or {@code null} if all packages should be updated or
* package is deleted
*
* @return {@code true} if a permission source package might have changed
*/
private boolean updatePermissionSourcePackage(@Nullable String packageName,
@Nullable AndroidPackage pkg,
final @Nullable PermissionCallback callback) {
// Always need update if packageName is null
if (packageName == null) {
return true;
}
boolean changed = false;
Set<Permission> needsUpdate = null;
synchronized (mLock) {
for (final Permission bp : mRegistry.getPermissions()) {
if (bp.isDynamic()) {
bp.updateDynamicPermission(mRegistry.getPermissionTrees());
}
if (!packageName.equals(bp.getPackageName())) {
// Not checking sourcePackageSetting because it can be null when
// the permission source package is the target package and the target package is
// being uninstalled,
continue;
}
// The target package is the source of the current permission
// Set to changed for either install or uninstall
changed = true;
if (needsUpdate == null) {
needsUpdate = new ArraySet<>();
}
needsUpdate.add(bp);
}
}
if (needsUpdate != null) {
for (final Permission bp : needsUpdate) {
// If the target package is being uninstalled, we need to revoke this permission
// From all other packages
if (pkg == null || !hasPermission(pkg, bp.getName())) {
Slog.i(TAG, "Removing permission " + bp.getName()
+ " that used to be declared by " + bp.getPackageName());
if (bp.isRuntime()) {
final int[] userIds = mUserManagerInt.getUserIds();
final int numUserIds = userIds.length;
for (int userIdNum = 0; userIdNum < numUserIds; userIdNum++) {
final int userId = userIds[userIdNum];
mPackageManagerInt.forEachPackage((AndroidPackage p) ->
revokePermissionFromPackageForUser(p.getPackageName(),
bp.getName(), true, userId, callback));
}
} else {
mPackageManagerInt.forEachPackage(p -> {
final int[] userIds = mUserManagerInt.getUserIds();
synchronized (mLock) {
for (final int userId : userIds) {
final UidPermissionState uidState = getUidStateLocked(p,
userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for "
+ p.getPackageName() + " and user " + userId);
continue;
}
uidState.removePermissionState(bp.getName());
}
}
});
}
synchronized (mLock) {
mRegistry.removePermission(bp.getName());
}
continue;
}
final AndroidPackage sourcePkg =
mPackageManagerInt.getPackage(bp.getPackageName());
final PackageSetting sourcePs =
(PackageSetting) mPackageManagerInt.getPackageSetting(
bp.getPackageName());
synchronized (mLock) {
if (sourcePkg != null && sourcePs != null) {
continue;
}
Slog.w(TAG, "Removing dangling permission: " + bp.getName()
+ " from package " + bp.getPackageName());
mRegistry.removePermission(bp.getName());
}
}
}
return changed;
}
/**
* Revoke a runtime permission from a package for a given user ID.
*/
private void revokePermissionFromPackageForUser(@NonNull String pName,
@NonNull String permissionName, boolean overridePolicy, int userId,
@Nullable PermissionCallback callback) {
final ApplicationInfo appInfo =
mPackageManagerInt.getApplicationInfo(pName, 0,
Process.SYSTEM_UID, UserHandle.USER_SYSTEM);
if (appInfo != null
&& appInfo.targetSdkVersion < Build.VERSION_CODES.M) {
return;
}
if (checkPermissionImpl(pName, permissionName, userId)
== PackageManager.PERMISSION_GRANTED) {
try {
revokeRuntimePermissionInternal(
pName, permissionName,
overridePolicy,
Process.SYSTEM_UID,
userId,
null, callback);
} catch (IllegalArgumentException e) {
Slog.e(TAG,
"Failed to revoke "
+ permissionName
+ " from "
+ pName,
e);
}
}
}
/**
* Update which app owns a permission trees.
*
* <p>Possible parameter combinations
* <table>
* <tr><th></th><th>packageName != null</th><th>packageName == null</th></tr>
* <tr><th>pkg != null</th><td>package is updated</td><td>invalid</td></tr>
* <tr><th>pkg == null</th><td>package is deleted</td><td>all packages are updated</td></tr>
* </table>
*
* @param packageName The package that is updated, or {@code null} if all packages should be
* updated
* @param pkg The package that is updated, or {@code null} if all packages should be updated or
* package is deleted
*
* @return {@code true} if a permission tree ownership might have changed
*/
private boolean updatePermissionTreeSourcePackage(@Nullable String packageName,
@Nullable AndroidPackage pkg) {
// Always need update if packageName is null
if (packageName == null) {
return true;
}
boolean changed = false;
Set<Permission> needsUpdate = null;
synchronized (mLock) {
final Iterator<Permission> it = mRegistry.getPermissionTrees().iterator();
while (it.hasNext()) {
final Permission bp = it.next();
if (!packageName.equals(bp.getPackageName())) {
// Not checking sourcePackageSetting because it can be null when
// the permission source package is the target package and the target package is
// being uninstalled,
continue;
}
// The target package is the source of the current permission tree
// Set to changed for either install or uninstall
changed = true;
if (pkg == null || !hasPermission(pkg, bp.getName())) {
Slog.i(TAG, "Removing permission tree " + bp.getName()
+ " that used to be declared by " + bp.getPackageName());
it.remove();
}
if (needsUpdate == null) {
needsUpdate = new ArraySet<>();
}
needsUpdate.add(bp);
}
}
if (needsUpdate != null) {
for (final Permission bp : needsUpdate) {
final AndroidPackage sourcePkg =
mPackageManagerInt.getPackage(bp.getPackageName());
final PackageSetting sourcePs =
(PackageSetting) mPackageManagerInt.getPackageSetting(
bp.getPackageName());
synchronized (mLock) {
if (sourcePkg != null && sourcePs != null) {
continue;
}
Slog.w(TAG, "Removing dangling permission tree: " + bp.getName()
+ " from package " + bp.getPackageName());
mRegistry.removePermission(bp.getName());
}
}
}
return changed;
}
private void enforceGrantRevokeRuntimePermissionPermissions(String message) {
if (mContext.checkCallingOrSelfPermission(Manifest.permission.GRANT_RUNTIME_PERMISSIONS)
!= PackageManager.PERMISSION_GRANTED
&& mContext.checkCallingOrSelfPermission(Manifest.permission.REVOKE_RUNTIME_PERMISSIONS)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException(message + " requires "
+ Manifest.permission.GRANT_RUNTIME_PERMISSIONS + " or "
+ Manifest.permission.REVOKE_RUNTIME_PERMISSIONS);
}
}
private void enforceGrantRevokeGetRuntimePermissionPermissions(@NonNull String message) {
if (mContext.checkCallingOrSelfPermission(Manifest.permission.GET_RUNTIME_PERMISSIONS)
!= PackageManager.PERMISSION_GRANTED
&& mContext.checkCallingOrSelfPermission(Manifest.permission.GRANT_RUNTIME_PERMISSIONS)
!= PackageManager.PERMISSION_GRANTED
&& mContext.checkCallingOrSelfPermission(Manifest.permission.REVOKE_RUNTIME_PERMISSIONS)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException(message + " requires "
+ Manifest.permission.GRANT_RUNTIME_PERMISSIONS + " or "
+ Manifest.permission.REVOKE_RUNTIME_PERMISSIONS + " or "
+ Manifest.permission.GET_RUNTIME_PERMISSIONS);
}
}
/**
* Enforces the request is from the system or an app that has INTERACT_ACROSS_USERS
* or INTERACT_ACROSS_USERS_FULL permissions, if the {@code userId} is not for the caller.
*
* @param checkShell whether to prevent shell from access if there's a debugging restriction
* @param message the message to log on security exception
*/
private void enforceCrossUserPermission(int callingUid, @UserIdInt int userId,
boolean requireFullPermission, boolean checkShell, @Nullable String message) {
if (userId < 0) {
throw new IllegalArgumentException("Invalid userId " + userId);
}
if (checkShell) {
enforceShellRestriction(UserManager.DISALLOW_DEBUGGING_FEATURES, callingUid, userId);
}
final int callingUserId = UserHandle.getUserId(callingUid);
if (checkCrossUserPermission(callingUid, callingUserId, userId, requireFullPermission)) {
return;
}
String errorMessage = buildInvalidCrossUserPermissionMessage(
callingUid, userId, message, requireFullPermission);
Slog.w(TAG, errorMessage);
throw new SecurityException(errorMessage);
}
/**
* Enforces that if the caller is shell, it does not have the provided user restriction.
*/
private void enforceShellRestriction(@NonNull String restriction, int callingUid,
@UserIdInt int userId) {
if (callingUid == Process.SHELL_UID) {
if (userId >= 0 && mUserManagerInt.hasUserRestriction(restriction, userId)) {
throw new SecurityException("Shell does not have permission to access user "
+ userId);
} else if (userId < 0) {
Slog.e(LOG_TAG, "Unable to check shell permission for user "
+ userId + "\n\t" + Debug.getCallers(3));
}
}
}
private boolean checkCrossUserPermission(int callingUid, @UserIdInt int callingUserId,
@UserIdInt int userId, boolean requireFullPermission) {
if (userId == callingUserId) {
return true;
}
if (callingUid == Process.SYSTEM_UID || callingUid == Process.ROOT_UID) {
return true;
}
if (requireFullPermission) {
return checkCallingOrSelfPermission(
android.Manifest.permission.INTERACT_ACROSS_USERS_FULL);
}
return checkCallingOrSelfPermission(android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
|| checkCallingOrSelfPermission(android.Manifest.permission.INTERACT_ACROSS_USERS);
}
private boolean checkCallingOrSelfPermission(String permission) {
return mContext.checkCallingOrSelfPermission(permission)
== PackageManager.PERMISSION_GRANTED;
}
@NonNull
private static String buildInvalidCrossUserPermissionMessage(int callingUid,
@UserIdInt int userId, @Nullable String message, boolean requireFullPermission) {
StringBuilder builder = new StringBuilder();
if (message != null) {
builder.append(message);
builder.append(": ");
}
builder.append("UID ");
builder.append(callingUid);
builder.append(" requires ");
builder.append(android.Manifest.permission.INTERACT_ACROSS_USERS_FULL);
if (!requireFullPermission) {
builder.append(" or ");
builder.append(android.Manifest.permission.INTERACT_ACROSS_USERS);
}
builder.append(" to access user ");
builder.append(userId);
builder.append(".");
return builder.toString();
}
@GuardedBy("mLock")
private int calculateCurrentPermissionFootprintLocked(@NonNull Permission permissionTree) {
int size = 0;
for (final Permission permission : mRegistry.getPermissions()) {
size += permissionTree.calculateFootprint(permission);
}
return size;
}
@GuardedBy("mLock")
private void enforcePermissionCapLocked(PermissionInfo info, Permission tree) {
// We calculate the max size of permissions defined by this uid and throw
// if that plus the size of 'info' would exceed our stated maximum.
if (tree.getUid() != Process.SYSTEM_UID) {
final int curTreeSize = calculateCurrentPermissionFootprintLocked(tree);
if (curTreeSize + info.calculateFootprint() > MAX_PERMISSION_TREE_FOOTPRINT) {
throw new SecurityException("Permission tree size cap exceeded");
}
}
}
private void systemReady() {
// Now that we've scanned all packages, and granted any default
// permissions, ensure permissions are updated. Beware of dragons if you
// try optimizing this.
updateAllPermissions(StorageManager.UUID_PRIVATE_INTERNAL, false);
final PermissionPolicyInternal permissionPolicyInternal = LocalServices.getService(
PermissionPolicyInternal.class);
permissionPolicyInternal.setOnInitializedCallback(userId ->
// The SDK updated case is already handled when we run during the ctor.
updateAllPermissions(StorageManager.UUID_PRIVATE_INTERNAL, false)
);
mSystemReady = true;
synchronized (mLock) {
if (mPrivappPermissionsViolations != null) {
throw new IllegalStateException("Signature|privileged permissions not in "
+ "privapp-permissions allowlist: " + mPrivappPermissionsViolations);
}
}
mPermissionControllerManager = mContext.getSystemService(PermissionControllerManager.class);
mPermissionPolicyInternal = LocalServices.getService(PermissionPolicyInternal.class);
}
private static String getVolumeUuidForPackage(AndroidPackage pkg) {
if (pkg == null) {
return StorageManager.UUID_PRIVATE_INTERNAL;
}
if (pkg.isExternalStorage()) {
if (TextUtils.isEmpty(pkg.getVolumeUuid())) {
return StorageManager.UUID_PRIMARY_PHYSICAL;
} else {
return pkg.getVolumeUuid();
}
} else {
return StorageManager.UUID_PRIVATE_INTERNAL;
}
}
private static boolean hasPermission(AndroidPackage pkg, String permName) {
if (pkg.getPermissions().isEmpty()) {
return false;
}
for (int i = pkg.getPermissions().size() - 1; i >= 0; i--) {
if (pkg.getPermissions().get(i).getName().equals(permName)) {
return true;
}
}
return false;
}
/**
* Log that a permission request was granted/revoked.
*
* @param action the action performed
* @param name name of the permission
* @param packageName package permission is for
*/
private void logPermission(int action, @NonNull String name, @NonNull String packageName) {
final LogMaker log = new LogMaker(action);
log.setPackageName(packageName);
log.addTaggedData(MetricsEvent.FIELD_PERMISSION, name);
mMetricsLogger.write(log);
}
@GuardedBy("mLock")
@Nullable
private UidPermissionState getUidStateLocked(@NonNull PackageSetting ps,
@UserIdInt int userId) {
return getUidStateLocked(ps.getAppId(), userId);
}
@GuardedBy("mLock")
@Nullable
private UidPermissionState getUidStateLocked(@NonNull AndroidPackage pkg,
@UserIdInt int userId) {
return getUidStateLocked(pkg.getUid(), userId);
}
@GuardedBy("mLock")
@Nullable
private UidPermissionState getUidStateLocked(@AppIdInt int appId, @UserIdInt int userId) {
final UserPermissionState userState = mState.getUserState(userId);
if (userState == null) {
return null;
}
return userState.getUidState(appId);
}
private void removeUidStateAndResetPackageInstallPermissionsFixed(@AppIdInt int appId,
@NonNull String packageName, @UserIdInt int userId) {
synchronized (mLock) {
final UserPermissionState userState = mState.getUserState(userId);
if (userState == null) {
return;
}
userState.removeUidState(appId);
userState.setInstallPermissionsFixed(packageName, false);
}
}
private void readLegacyPermissionState() {
final int[] userIds = getAllUserIds();
mPackageManagerInt.forEachPackageSetting(ps -> {
final int appId = ps.getAppId();
final LegacyPermissionState legacyState = ps.getLegacyPermissionState();
synchronized (mLock) {
for (final int userId : userIds) {
final UserPermissionState userState = mState.getOrCreateUserState(userId);
userState.setInstallPermissionsFixed(ps.name, ps.areInstallPermissionsFixed());
final UidPermissionState uidState = userState.getOrCreateUidState(appId);
uidState.reset();
uidState.setMissing(legacyState.isMissing(userId));
readLegacyPermissionStatesLocked(uidState,
legacyState.getPermissionStates(userId));
}
}
});
}
@GuardedBy("mLock")
private void readLegacyPermissionStatesLocked(@NonNull UidPermissionState uidState,
@NonNull Collection<LegacyPermissionState.PermissionState> permissionStates) {
for (final LegacyPermissionState.PermissionState permissionState : permissionStates) {
final String permissionName = permissionState.getName();
final Permission permission = mRegistry.getPermission(permissionName);
if (permission == null) {
Slog.w(TAG, "Unknown permission: " + permissionName);
continue;
}
uidState.putPermissionState(permission, permissionState.isGranted(),
permissionState.getFlags());
}
}
private void writeLegacyPermissionState() {
final int[] userIds;
synchronized (mLock) {
userIds = mState.getUserIds();
}
mPackageManagerInt.forEachPackageSetting(ps -> {
ps.setInstallPermissionsFixed(false);
final LegacyPermissionState legacyState = ps.getLegacyPermissionState();
legacyState.reset();
final int appId = ps.getAppId();
synchronized (mLock) {
for (final int userId : userIds) {
final UserPermissionState userState = mState.getUserState(userId);
if (userState == null) {
Slog.e(TAG, "Missing user state for " + userId);
continue;
}
if (userState.areInstallPermissionsFixed(ps.name)) {
ps.setInstallPermissionsFixed(true);
}
final UidPermissionState uidState = userState.getUidState(appId);
if (uidState == null) {
Slog.e(TAG, "Missing permission state for " + ps.name + " and user "
+ userId);
continue;
}
legacyState.setMissing(uidState.isMissing(), userId);
final List<PermissionState> permissionStates = uidState.getPermissionStates();
final int permissionStatesSize = permissionStates.size();
for (int i = 0; i < permissionStatesSize; i++) {
final PermissionState permissionState = permissionStates.get(i);
final LegacyPermissionState.PermissionState legacyPermissionState =
new LegacyPermissionState.PermissionState(permissionState.getName(),
permissionState.getPermission().isRuntime(),
permissionState.isGranted(), permissionState.getFlags());
legacyState.putPermissionState(legacyPermissionState, userId);
}
}
}
});
}
private void readLegacyPermissions(@NonNull LegacyPermissionSettings legacyPermissionSettings) {
for (int readPermissionOrPermissionTree = 0; readPermissionOrPermissionTree < 2;
readPermissionOrPermissionTree++) {
final List<LegacyPermission> legacyPermissions = readPermissionOrPermissionTree == 0
? legacyPermissionSettings.getPermissions()
: legacyPermissionSettings.getPermissionTrees();
synchronized (mLock) {
final int legacyPermissionsSize = legacyPermissions.size();
for (int i = 0; i < legacyPermissionsSize; i++) {
final LegacyPermission legacyPermission = legacyPermissions.get(i);
final Permission permission = new Permission(
legacyPermission.getPermissionInfo(), legacyPermission.getType());
if (readPermissionOrPermissionTree == 0) {
// Config permissions are currently read in PermissionManagerService
// constructor. The old behavior was to add other attributes to the config
// permission in LegacyPermission.read(), so equivalently we can add the
// GIDs to the new permissions here, since config permissions created in
// PermissionManagerService constructor get only their names and GIDs there.
final Permission configPermission = mRegistry.getPermission(
permission.getName());
if (configPermission != null
&& configPermission.getType() == Permission.TYPE_CONFIG) {
permission.setGids(configPermission.getRawGids(),
configPermission.areGidsPerUser());
}
mRegistry.addPermission(permission);
} else {
mRegistry.addPermissionTree(permission);
}
}
}
}
}
private void writeLegacyPermissions(
@NonNull LegacyPermissionSettings legacyPermissionSettings) {
for (int writePermissionOrPermissionTree = 0; writePermissionOrPermissionTree < 2;
writePermissionOrPermissionTree++) {
final List<LegacyPermission> legacyPermissions = new ArrayList<>();
synchronized (mLock) {
final Collection<Permission> permissions = writePermissionOrPermissionTree == 0
? mRegistry.getPermissions() : mRegistry.getPermissionTrees();
for (final Permission permission : permissions) {
// We don't need to provide UID and GIDs, which are only retrieved when dumping.
final LegacyPermission legacyPermission = new LegacyPermission(
permission.getPermissionInfo(), permission.getType(), 0,
EmptyArray.INT);
legacyPermissions.add(legacyPermission);
}
}
if (writePermissionOrPermissionTree == 0) {
legacyPermissionSettings.replacePermissions(legacyPermissions);
} else {
legacyPermissionSettings.replacePermissionTrees(legacyPermissions);
}
}
}
private void onPackageAddedInternal(@NonNull AndroidPackage pkg, boolean isInstantApp,
@Nullable AndroidPackage oldPkg) {
if (!pkg.getAdoptPermissions().isEmpty()) {
// This package wants to adopt ownership of permissions from
// another package.
for (int i = pkg.getAdoptPermissions().size() - 1; i >= 0; i--) {
final String origName = pkg.getAdoptPermissions().get(i);
if (canAdoptPermissionsInternal(origName, pkg)) {
Slog.i(TAG, "Adopting permissions from " + origName + " to "
+ pkg.getPackageName());
synchronized (mLock) {
mRegistry.transferPermissions(origName, pkg.getPackageName());
}
}
}
}
// Don't allow ephemeral applications to define new permissions groups.
if (isInstantApp) {
Slog.w(TAG, "Permission groups from package " + pkg.getPackageName()
+ " ignored: instant apps cannot define new permission groups.");
} else {
addAllPermissionGroupsInternal(pkg);
}
// If a permission has had its defining app changed, or it has had its protection
// upgraded, we need to revoke apps that hold it
final List<String> permissionsWithChangedDefinition;
// Don't allow ephemeral applications to define new permissions.
if (isInstantApp) {
permissionsWithChangedDefinition = null;
Slog.w(TAG, "Permissions from package " + pkg.getPackageName()
+ " ignored: instant apps cannot define new permissions.");
} else {
permissionsWithChangedDefinition = addAllPermissionsInternal(pkg);
}
boolean hasOldPkg = oldPkg != null;
boolean hasPermissionDefinitionChanges =
!CollectionUtils.isEmpty(permissionsWithChangedDefinition);
if (hasOldPkg || hasPermissionDefinitionChanges) {
// We need to call revokeRuntimePermissionsIfGroupChanged async as permission
// revoke callbacks from this method might need to kill apps which need the
// mPackages lock on a different thread. This would dead lock.
AsyncTask.execute(() -> {
if (hasOldPkg) {
revokeRuntimePermissionsIfGroupChangedInternal(pkg, oldPkg);
revokeStoragePermissionsIfScopeExpandedInternal(pkg, oldPkg);
}
if (hasPermissionDefinitionChanges) {
revokeRuntimePermissionsIfPermissionDefinitionChangedInternal(
permissionsWithChangedDefinition);
}
});
}
}
private boolean canAdoptPermissionsInternal(@NonNull String oldPackageName,
@NonNull AndroidPackage newPkg) {
final PackageSetting oldPs = mPackageManagerInt.getPackageSetting(oldPackageName);
if (oldPs == null) {
return false;
}
if (!oldPs.isSystem()) {
Slog.w(TAG, "Unable to update from " + oldPs.name
+ " to " + newPkg.getPackageName()
+ ": old package not in system partition");
return false;
}
if (mPackageManagerInt.getPackage(oldPs.name) != null) {
Slog.w(TAG, "Unable to update from " + oldPs.name
+ " to " + newPkg.getPackageName()
+ ": old package still exists");
return false;
}
return true;
}
private void onPackageInstalledInternal(@NonNull AndroidPackage pkg,
@NonNull PermissionManagerServiceInternal.PackageInstalledParams params,
@UserIdInt int[] userIds) {
updatePermissions(pkg.getPackageName(), pkg);
for (final int userId : userIds) {
addAllowlistedRestrictedPermissionsInternal(pkg,
params.getAllowlistedRestrictedPermissions(),
FLAG_PERMISSION_WHITELIST_INSTALLER, userId);
final int autoRevokePermissionsMode = params.getAutoRevokePermissionsMode();
if (autoRevokePermissionsMode == AppOpsManager.MODE_ALLOWED
|| autoRevokePermissionsMode == AppOpsManager.MODE_IGNORED) {
setAutoRevokeExemptedInternal(pkg,
autoRevokePermissionsMode == AppOpsManager.MODE_IGNORED, userId);
}
grantRequestedRuntimePermissionsInternal(pkg, params.getGrantedPermissions(), userId);
}
}
private void addAllowlistedRestrictedPermissionsInternal(@NonNull AndroidPackage pkg,
@NonNull List<String> allowlistedRestrictedPermissions,
@PermissionWhitelistFlags int flags, @UserIdInt int userId) {
List<String> permissions = getAllowlistedRestrictedPermissionsInternal(pkg, flags, userId);
if (permissions != null) {
ArraySet<String> permissionSet = new ArraySet<>(permissions);
permissionSet.addAll(allowlistedRestrictedPermissions);
permissions = new ArrayList<>(permissionSet);
} else {
permissions = allowlistedRestrictedPermissions;
}
setAllowlistedRestrictedPermissionsInternal(pkg, permissions, flags, userId);
}
private void onPackageRemovedInternal(@NonNull AndroidPackage pkg) {
removeAllPermissionsInternal(pkg);
}
private void onPackageUninstalledInternal(@NonNull String packageName, int appId,
@Nullable AndroidPackage pkg, @NonNull List<AndroidPackage> sharedUserPkgs,
@UserIdInt int[] userIds) {
// TODO: Move these checks to check PackageState to be more reliable.
// System packages should always have an available APK.
if (pkg != null && pkg.isSystem()
// We may be fully removing invalid system packages during boot, and in that case we
// do want to remove their permission state. So make sure that the package is only
// being marked as uninstalled instead of fully removed.
&& mPackageManagerInt.getPackage(packageName) != null) {
// If we are only marking a system package as uninstalled, we need to keep its
// pregranted permission state so that it still works once it gets reinstalled, thus
// only reset the user modifications to its permission state.
for (final int userId : userIds) {
resetRuntimePermissionsInternal(pkg, userId);
}
return;
}
updatePermissions(packageName, null);
for (final int userId : userIds) {
if (sharedUserPkgs.isEmpty()) {
removeUidStateAndResetPackageInstallPermissionsFixed(appId, packageName, userId);
} else {
// Remove permissions associated with package. Since runtime
// permissions are per user we have to kill the removed package
// or packages running under the shared user of the removed
// package if revoking the permissions requested only by the removed
// package is successful and this causes a change in gids.
final int userIdToKill = revokeSharedUserPermissionsForDeletedPackageInternal(pkg,
sharedUserPkgs, userId);
final boolean shouldKill = userIdToKill != UserHandle.USER_NULL;
// If gids changed, kill all affected packages.
if (shouldKill) {
mHandler.post(() -> {
// This has to happen with no lock held.
killUid(appId, UserHandle.USER_ALL, KILL_APP_REASON_GIDS_CHANGED);
});
}
}
}
}
@NonNull
private List<LegacyPermission> getLegacyPermissions() {
synchronized (mLock) {
final List<LegacyPermission> legacyPermissions = new ArrayList<>();
for (final Permission permission : mRegistry.getPermissions()) {
final LegacyPermission legacyPermission = new LegacyPermission(
permission.getPermissionInfo(), permission.getType(), permission.getUid(),
permission.getRawGids());
legacyPermissions.add(legacyPermission);
}
return legacyPermissions;
}
}
@NonNull
private Map<String, Set<String>> getAllAppOpPermissionPackages() {
synchronized (mLock) {
final ArrayMap<String, ArraySet<String>> appOpPermissionPackages =
mRegistry.getAllAppOpPermissionPackages();
final Map<String, Set<String>> deepClone = new ArrayMap<>();
final int appOpPermissionPackagesSize = appOpPermissionPackages.size();
for (int i = 0; i < appOpPermissionPackagesSize; i++) {
final String appOpPermission = appOpPermissionPackages.keyAt(i);
final ArraySet<String> packageNames = appOpPermissionPackages.valueAt(i);
deepClone.put(appOpPermission, new ArraySet<>(packageNames));
}
return deepClone;
}
}
@NonNull
private LegacyPermissionState getLegacyPermissionState(@AppIdInt int appId) {
final LegacyPermissionState legacyState = new LegacyPermissionState();
synchronized (mLock) {
final int[] userIds = mState.getUserIds();
for (final int userId : userIds) {
final UidPermissionState uidState = getUidStateLocked(appId, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for app ID " + appId + " and user ID "
+ userId);
continue;
}
final List<PermissionState> permissionStates = uidState.getPermissionStates();
final int permissionStatesSize = permissionStates.size();
for (int i = 0; i < permissionStatesSize; i++) {
final PermissionState permissionState = permissionStates.get(i);
final LegacyPermissionState.PermissionState legacyPermissionState =
new LegacyPermissionState.PermissionState(permissionState.getName(),
permissionState.getPermission().isRuntime(),
permissionState.isGranted(), permissionState.getFlags());
legacyState.putPermissionState(legacyPermissionState, userId);
}
}
}
return legacyState;
}
@NonNull
private int[] getGidsForUid(int uid) {
final int appId = UserHandle.getAppId(uid);
final int userId = UserHandle.getUserId(uid);
synchronized (mLock) {
final UidPermissionState uidState = getUidStateLocked(appId, userId);
if (uidState == null) {
Slog.e(TAG, "Missing permissions state for app ID " + appId + " and user ID "
+ userId);
return EMPTY_INT_ARRAY;
}
return uidState.computeGids(mGlobalGids, userId);
}
}
private class PermissionManagerServiceInternalImpl implements PermissionManagerServiceInternal {
@Override
public int checkPermission(@NonNull String packageName, @NonNull String permissionName,
@UserIdInt int userId) {
return PermissionManagerService.this.checkPermission(packageName, permissionName,
userId);
}
@Override
public int checkUidPermission(int uid, @NonNull String permissionName) {
return PermissionManagerService.this.checkUidPermission(uid, permissionName);
}
@Override
public void onSystemReady() {
PermissionManagerService.this.systemReady();
}
@Override
public boolean isPermissionsReviewRequired(@NonNull String packageName,
@UserIdInt int userId) {
Objects.requireNonNull(packageName, "packageName");
// TODO(b/173235285): Some caller may pass USER_ALL as userId.
//Preconditions.checkArgumentNonnegative(userId, "userId");
return isPermissionsReviewRequiredInternal(packageName, userId);
}
@Override
public void readLegacyPermissionStateTEMP() {
PermissionManagerService.this.readLegacyPermissionState();
}
@Override
public void writeLegacyPermissionStateTEMP() {
PermissionManagerService.this.writeLegacyPermissionState();
}
@Override
public void onUserRemoved(@UserIdInt int userId) {
Preconditions.checkArgumentNonNegative(userId, "userId");
PermissionManagerService.this.onUserRemoved(userId);
}
@NonNull
@Override
public Set<String> getGrantedPermissions(@NonNull String packageName,
@UserIdInt int userId) {
Objects.requireNonNull(packageName, "packageName");
Preconditions.checkArgumentNonNegative(userId, "userId");
return getGrantedPermissionsInternal(packageName, userId);
}
@NonNull
@Override
public int[] getPermissionGids(@NonNull String permissionName, @UserIdInt int userId) {
Objects.requireNonNull(permissionName, "permissionName");
Preconditions.checkArgumentNonNegative(userId, "userId");
return getPermissionGidsInternal(permissionName, userId);
}
@NonNull
@Override
public String[] getAppOpPermissionPackages(@NonNull String permissionName) {
Objects.requireNonNull(permissionName, "permissionName");
return PermissionManagerService.this.getAppOpPermissionPackagesInternal(permissionName);
}
@Override
public void onStorageVolumeMounted(@Nullable String volumeUuid, boolean fingerprintChanged) {
updateAllPermissions(volumeUuid, fingerprintChanged);
}
@Override
public void resetRuntimePermissions(@NonNull AndroidPackage pkg, @UserIdInt int userId) {
Objects.requireNonNull(pkg, "pkg");
Preconditions.checkArgumentNonNegative(userId, "userId");
resetRuntimePermissionsInternal(pkg, userId);
}
@Override
public Permission getPermissionTEMP(String permName) {
synchronized (mLock) {
return mRegistry.getPermission(permName);
}
}
@Override
public @NonNull ArrayList<PermissionInfo> getAllPermissionsWithProtection(
@PermissionInfo.Protection int protection) {
ArrayList<PermissionInfo> matchingPermissions = new ArrayList<>();
synchronized (mLock) {
for (final Permission permission : mRegistry.getPermissions()) {
if (permission.getProtection() == protection) {
matchingPermissions.add(permission.generatePermissionInfo(0));
}
}
}
return matchingPermissions;
}
@Override
public @NonNull ArrayList<PermissionInfo> getAllPermissionsWithProtectionFlags(
@PermissionInfo.ProtectionFlags int protectionFlags) {
ArrayList<PermissionInfo> matchingPermissions = new ArrayList<>();
synchronized (mLock) {
for (final Permission permission : mRegistry.getPermissions()) {
if ((permission.getProtectionFlags() & protectionFlags) == protectionFlags) {
matchingPermissions.add(permission.generatePermissionInfo(0));
}
}
}
return matchingPermissions;
}
@Nullable
@Override
public byte[] backupRuntimePermissions(@UserIdInt int userId) {
Preconditions.checkArgumentNonNegative(userId, "userId");
return PermissionManagerService.this.backupRuntimePermissions(userId);
}
@Override
public void restoreRuntimePermissions(@NonNull byte[] backup, @UserIdInt int userId) {
Objects.requireNonNull(backup, "backup");
Preconditions.checkArgumentNonNegative(userId, "userId");
PermissionManagerService.this.restoreRuntimePermissions(backup, userId);
}
@Override
public void restoreDelayedRuntimePermissions(@NonNull String packageName,
@UserIdInt int userId) {
Objects.requireNonNull(packageName, "packageName");
Preconditions.checkArgumentNonNegative(userId, "userId");
PermissionManagerService.this.restoreDelayedRuntimePermissions(packageName, userId);
}
@Override
public void addOnRuntimePermissionStateChangedListener(
OnRuntimePermissionStateChangedListener listener) {
PermissionManagerService.this.addOnRuntimePermissionStateChangedListener(
listener);
}
@Override
public void removeOnRuntimePermissionStateChangedListener(
OnRuntimePermissionStateChangedListener listener) {
PermissionManagerService.this.removeOnRuntimePermissionStateChangedListener(
listener);
}
@Override
public void startShellPermissionIdentityDelegation(int uid, @NonNull String packageName,
@Nullable List<String> permissionNames) {
Objects.requireNonNull(packageName, "packageName");
startShellPermissionIdentityDelegationInternal(uid, packageName, permissionNames);
}
@Override
public void stopShellPermissionIdentityDelegation() {
stopShellPermissionIdentityDelegationInternal();
}
@Override
@NonNull
public List<String> getDelegatedShellPermissions() {
return getDelegatedShellPermissionsInternal();
}
@Override
public void onUserCreated(@UserIdInt int userId) {
Preconditions.checkArgumentNonNegative(userId, "userId");
// NOTE: This adds UPDATE_PERMISSIONS_REPLACE_PKG
updateAllPermissions(StorageManager.UUID_PRIVATE_INTERNAL, true);
}
@Override
public void readLegacyPermissionsTEMP(
@NonNull LegacyPermissionSettings legacyPermissionSettings) {
PermissionManagerService.this.readLegacyPermissions(legacyPermissionSettings);
}
@Override
public void writeLegacyPermissionsTEMP(
@NonNull LegacyPermissionSettings legacyPermissionSettings) {
PermissionManagerService.this.writeLegacyPermissions(legacyPermissionSettings);
}
@Override
public void onPackageAdded(@NonNull AndroidPackage pkg, boolean isInstantApp,
@Nullable AndroidPackage oldPkg) {
Objects.requireNonNull(pkg);
onPackageAddedInternal(pkg, isInstantApp, oldPkg);
}
@Override
public void onPackageInstalled(@NonNull AndroidPackage pkg,
@NonNull PackageInstalledParams params, @UserIdInt int userId) {
Objects.requireNonNull(pkg, "pkg");
Objects.requireNonNull(params, "params");
Preconditions.checkArgument(userId >= UserHandle.USER_SYSTEM
|| userId == UserHandle.USER_ALL, "userId");
final int[] userIds = userId == UserHandle.USER_ALL ? getAllUserIds()
: new int[] { userId };
onPackageInstalledInternal(pkg, params, userIds);
}
@Override
public void onPackageRemoved(@NonNull AndroidPackage pkg) {
Objects.requireNonNull(pkg);
onPackageRemovedInternal(pkg);
}
@Override
public void onPackageUninstalled(@NonNull String packageName, int appId,
@Nullable AndroidPackage pkg, @NonNull List<AndroidPackage> sharedUserPkgs,
@UserIdInt int userId) {
Objects.requireNonNull(packageName, "packageName");
Objects.requireNonNull(sharedUserPkgs, "sharedUserPkgs");
Preconditions.checkArgument(userId >= UserHandle.USER_SYSTEM
|| userId == UserHandle.USER_ALL, "userId");
final int[] userIds = userId == UserHandle.USER_ALL ? getAllUserIds()
: new int[] { userId };
onPackageUninstalledInternal(packageName, appId, pkg, sharedUserPkgs, userIds);
}
@NonNull
@Override
public List<LegacyPermission> getLegacyPermissions() {
return PermissionManagerService.this.getLegacyPermissions();
}
@NonNull
@Override
public Map<String, Set<String>> getAllAppOpPermissionPackages() {
return PermissionManagerService.this.getAllAppOpPermissionPackages();
}
@NonNull
@Override
public LegacyPermissionState getLegacyPermissionState(@AppIdInt int appId) {
return PermissionManagerService.this.getLegacyPermissionState(appId);
}
@NonNull
@Override
public int[] getGidsForUid(int uid) {
return PermissionManagerService.this.getGidsForUid(uid);
}
@Override
public void setHotwordDetectionServiceProvider(HotwordDetectionServiceProvider provider) {
mHotwordDetectionServiceProvider = provider;
}
@Override
public HotwordDetectionServiceProvider getHotwordDetectionServiceProvider() {
return mHotwordDetectionServiceProvider;
}
}
/**
* Callbacks invoked when interesting actions have been taken on a permission.
* <p>
* NOTE: The current arguments are merely to support the existing use cases. This
* needs to be properly thought out with appropriate arguments for each of the
* callback methods.
*/
private static class PermissionCallback {
public void onGidsChanged(@AppIdInt int appId, @UserIdInt int userId) {}
public void onPermissionChanged() {}
public void onPermissionGranted(int uid, @UserIdInt int userId) {}
public void onInstallPermissionGranted() {}
public void onPermissionRevoked(int uid, @UserIdInt int userId, String reason) {}
public void onInstallPermissionRevoked() {}
public void onPermissionUpdated(@UserIdInt int[] updatedUserIds, boolean sync) {}
public void onPermissionUpdatedNotifyListener(@UserIdInt int[] updatedUserIds, boolean sync,
int uid) {
onPermissionUpdated(updatedUserIds, sync);
}
public void onPermissionRemoved() {}
public void onInstallPermissionUpdated() {}
public void onInstallPermissionUpdatedNotifyListener(int uid) {
onInstallPermissionUpdated();
}
}
private static final class OnPermissionChangeListeners extends Handler {
private static final int MSG_ON_PERMISSIONS_CHANGED = 1;
private final RemoteCallbackList<IOnPermissionsChangeListener> mPermissionListeners =
new RemoteCallbackList<>();
OnPermissionChangeListeners(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_ON_PERMISSIONS_CHANGED: {
final int uid = msg.arg1;
handleOnPermissionsChanged(uid);
} break;
}
}
public void addListener(IOnPermissionsChangeListener listener) {
mPermissionListeners.register(listener);
}
public void removeListener(IOnPermissionsChangeListener listener) {
mPermissionListeners.unregister(listener);
}
public void onPermissionsChanged(int uid) {
if (mPermissionListeners.getRegisteredCallbackCount() > 0) {
obtainMessage(MSG_ON_PERMISSIONS_CHANGED, uid, 0).sendToTarget();
}
}
private void handleOnPermissionsChanged(int uid) {
final int count = mPermissionListeners.beginBroadcast();
try {
for (int i = 0; i < count; i++) {
IOnPermissionsChangeListener callback = mPermissionListeners
.getBroadcastItem(i);
try {
callback.onPermissionsChanged(uid);
} catch (RemoteException e) {
Log.e(TAG, "Permission listener is dead", e);
}
}
} finally {
mPermissionListeners.finishBroadcast();
}
}
}
/**
* Interface to intercept permission checks and optionally pass through to the original
* implementation.
*/
private interface CheckPermissionDelegate {
/**
* Get the UID whose permission checks is being delegated.
*
* @return the UID
*/
int getDelegatedUid();
/**
* Check whether the given package has been granted the specified permission.
*
* @param packageName the name of the package to be checked
* @param permissionName the name of the permission to be checked
* @param userId the user ID
* @param superImpl the original implementation that can be delegated to
* @return {@link android.content.pm.PackageManager#PERMISSION_GRANTED} if the package has
* the permission, or {@link android.content.pm.PackageManager#PERMISSION_DENIED} otherwise
*
* @see android.content.pm.PackageManager#checkPermission(String, String)
*/
int checkPermission(@NonNull String packageName, @NonNull String permissionName,
@UserIdInt int userId,
@NonNull TriFunction<String, String, Integer, Integer> superImpl);
/**
* Check whether the given UID has been granted the specified permission.
*
* @param uid the UID to be checked
* @param permissionName the name of the permission to be checked
* @param superImpl the original implementation that can be delegated to
* @return {@link android.content.pm.PackageManager#PERMISSION_GRANTED} if the package has
* the permission, or {@link android.content.pm.PackageManager#PERMISSION_DENIED} otherwise
*/
int checkUidPermission(int uid, @NonNull String permissionName,
BiFunction<Integer, String, Integer> superImpl);
/**
* @return list of delegated permissions
*/
List<String> getDelegatedPermissionNames();
}
private class ShellDelegate implements CheckPermissionDelegate {
private final int mDelegatedUid;
@NonNull
private final String mDelegatedPackageName;
@Nullable
private final List<String> mDelegatedPermissionNames;
public ShellDelegate(int delegatedUid, @NonNull String delegatedPackageName,
@Nullable List<String> delegatedPermissionNames) {
mDelegatedUid = delegatedUid;
mDelegatedPackageName = delegatedPackageName;
mDelegatedPermissionNames = delegatedPermissionNames;
}
@Override
public int getDelegatedUid() {
return mDelegatedUid;
}
@Override
public int checkPermission(@NonNull String packageName, @NonNull String permissionName,
int userId, @NonNull TriFunction<String, String, Integer, Integer> superImpl) {
if (mDelegatedPackageName.equals(packageName)
&& isDelegatedPermission(permissionName)) {
final long identity = Binder.clearCallingIdentity();
try {
return superImpl.apply("com.android.shell", permissionName, userId);
} finally {
Binder.restoreCallingIdentity(identity);
}
}
return superImpl.apply(packageName, permissionName, userId);
}
@Override
public int checkUidPermission(int uid, @NonNull String permissionName,
@NonNull BiFunction<Integer, String, Integer> superImpl) {
if (uid == mDelegatedUid && isDelegatedPermission(permissionName)) {
final long identity = Binder.clearCallingIdentity();
try {
return superImpl.apply(Process.SHELL_UID, permissionName);
} finally {
Binder.restoreCallingIdentity(identity);
}
}
return superImpl.apply(uid, permissionName);
}
@Override
public List<String> getDelegatedPermissionNames() {
return mDelegatedPermissionNames == null
? null
: new ArrayList<>(mDelegatedPermissionNames);
}
private boolean isDelegatedPermission(@NonNull String permissionName) {
// null permissions means all permissions are targeted
return mDelegatedPermissionNames == null
|| mDelegatedPermissionNames.contains(permissionName);
}
}
private static final class AttributionSourceRegistry {
private final Object mLock = new Object();
private final Context mContext;
AttributionSourceRegistry(@NonNull Context context) {
mContext = context;
}
private final WeakHashMap<IBinder, AttributionSource> mAttributions = new WeakHashMap<>();
public void registerAttributionSource(@NonNull AttributionSource source) {
// Here we keep track of attribution sources that were created by an app
// from an attribution chain that called into the app and the apps's
// own attribution source. An app can register an attribution chain up
// to itself inclusive if and only if it is adding a node for itself which
// optionally points to an attribution chain that was created by each
// preceding app recursively up to the beginning of the chain.
// The only special case is when the first app in the attribution chain
// creates a source that points to another app (not a chain of apps). We
// allow this even if the source the app points to is not registered since
// in app ops we allow every app to blame every other app (untrusted if not
// holding a special permission).
// This technique ensures that a bad actor in the middle of the attribution
// chain can neither prepend nor append an invalid attribution sequence, i.e.
// a sequence that is not constructed by trusted sources up to the that bad
// actor's app.
// Note that passing your attribution source to another app means you allow
// it to blame private data access on your app. This can be mediated by the OS
// in, which case security is already enforced; by other app's code running in
// your process calling into the other app, in which case it can already access
// the private data in your process; or by you explicitly calling to another
// app passing the source, in which case you must trust the other side;
final int callingUid = Binder.getCallingUid();
if (source.getUid() != callingUid && mContext.checkPermission(
Manifest.permission.UPDATE_APP_OPS_STATS, /*pid*/ -1, callingUid)
!= PackageManager.PERMISSION_GRANTED) {
throw new SecurityException("Cannot register attribution source for uid:"
+ source.getUid() + " from uid:" + callingUid);
}
final PackageManagerInternal packageManagerInternal = LocalServices.getService(
PackageManagerInternal.class);
if (packageManagerInternal.getPackageUid(source.getPackageName(), 0,
UserHandle.getUserId(callingUid)) != source.getUid()) {
throw new SecurityException("Cannot register attribution source for package:"
+ source.getPackageName() + " from uid:" + callingUid);
}
final AttributionSource next = source.getNext();
if (next != null && next.getNext() != null
&& !isRegisteredAttributionSource(next)) {
throw new SecurityException("Cannot register forged attribution source:"
+ source);
}
synchronized (mLock) {
mAttributions.put(source.getToken(), source);
}
}
public boolean isRegisteredAttributionSource(@NonNull AttributionSource source) {
synchronized (mLock) {
final AttributionSource cachedSource = mAttributions.get(source.getToken());
if (cachedSource != null) {
return cachedSource.equals(source);
}
return false;
}
}
}
/**
* TODO: We need to consolidate these APIs either on PermissionManager or an extension
* object or a separate PermissionChecker service in context. The impartant part is to
* keep a single impl that is exposed to Java and native. We are not sure about the
* API shape so let is soak a bit.
*/
private static final class PermissionCheckerService extends IPermissionChecker.Stub {
// Cache for platform defined runtime permissions to avoid multi lookup (name -> info)
private static final ConcurrentHashMap<String, PermissionInfo> sPlatformPermissions
= new ConcurrentHashMap<>();
private static final AtomicInteger sAttributionChainIds = new AtomicInteger(0);
private final @NonNull Context mContext;
private final @NonNull AppOpsManager mAppOpsManager;
private final @NonNull PermissionManagerServiceInternal mPermissionManagerServiceInternal;
PermissionCheckerService(@NonNull Context context) {
mContext = context;
mAppOpsManager = mContext.getSystemService(AppOpsManager.class);
mPermissionManagerServiceInternal =
LocalServices.getService(PermissionManagerServiceInternal.class);
}
@Override
@PermissionCheckerManager.PermissionResult
public int checkPermission(@NonNull String permission,
@NonNull AttributionSourceState attributionSourceState, @Nullable String message,
boolean forDataDelivery, boolean startDataDelivery, boolean fromDatasource,
int attributedOp) {
Objects.requireNonNull(permission);
Objects.requireNonNull(attributionSourceState);
final AttributionSource attributionSource = new AttributionSource(
attributionSourceState);
final int result = checkPermission(mContext, mPermissionManagerServiceInternal,
permission, attributionSource, message, forDataDelivery, startDataDelivery,
fromDatasource, attributedOp);
// Finish any started op if some step in the attribution chain failed.
if (startDataDelivery && result != PermissionChecker.PERMISSION_GRANTED
&& result != PermissionChecker.PERMISSION_SOFT_DENIED) {
if (attributedOp == AppOpsManager.OP_NONE) {
finishDataDelivery(AppOpsManager.permissionToOpCode(permission),
attributionSource.asState(), fromDatasource);
} else {
finishDataDelivery(attributedOp, attributionSource.asState(), fromDatasource);
}
}
return result;
}
@Override
public void finishDataDelivery(int op,
@NonNull AttributionSourceState attributionSourceState, boolean fromDataSource) {
finishDataDelivery(mContext, op, attributionSourceState,
fromDataSource);
}
private static void finishDataDelivery(Context context, int op,
@NonNull AttributionSourceState attributionSourceState, boolean fromDatasource) {
Objects.requireNonNull(attributionSourceState);
AppOpsManager appOpsManager = context.getSystemService(AppOpsManager.class);
if (op == AppOpsManager.OP_NONE) {
return;
}
AttributionSource current = new AttributionSource(attributionSourceState);
AttributionSource next = null;
while (true) {
final boolean skipCurrentFinish = (fromDatasource || next != null);
next = current.getNext();
// If the call is from a datasource we need to vet only the chain before it. This
// way we can avoid the datasource creating an attribution context for every call.
if (!(fromDatasource && current.asState() == attributionSourceState)
&& next != null && !current.isTrusted(context)) {
return;
}
// The access is for oneself if this is the single receiver of data
// after the data source or if this is the single attribution source
// in the chain if not from a datasource.
final boolean singleReceiverFromDatasource = (fromDatasource
&& current.asState() == attributionSourceState && next != null
&& next.getNext() == null);
final boolean selfAccess = singleReceiverFromDatasource || next == null;
final AttributionSource accessorSource = (!singleReceiverFromDatasource)
? current : next;
if (selfAccess) {
final String resolvedPackageName = resolvePackageName(context, accessorSource);
if (resolvedPackageName == null) {
return;
}
appOpsManager.finishOp(accessorSource.getToken(), op,
accessorSource.getUid(), resolvedPackageName,
accessorSource.getAttributionTag());
} else {
final AttributionSource resolvedAttributionSource =
resolveAttributionSource(context, accessorSource);
if (resolvedAttributionSource.getPackageName() == null) {
return;
}
appOpsManager.finishProxyOp(AppOpsManager.opToPublicName(op),
resolvedAttributionSource, skipCurrentFinish);
}
if (next == null || next.getNext() == null) {
return;
}
RegisteredAttribution registered =
sRunningAttributionSources.remove(current.getToken());
if (registered != null) {
registered.unregister();
}
current = next;
}
}
@Override
@PermissionCheckerManager.PermissionResult
public int checkOp(int op, AttributionSourceState attributionSource,
String message, boolean forDataDelivery, boolean startDataDelivery) {
int result = checkOp(mContext, op, mPermissionManagerServiceInternal,
new AttributionSource(attributionSource), message, forDataDelivery,
startDataDelivery);
if (result != PermissionChecker.PERMISSION_GRANTED && startDataDelivery) {
// Finish any started op if some step in the attribution chain failed.
finishDataDelivery(op, attributionSource, /*fromDatasource*/ false);
}
return result;
}
@PermissionCheckerManager.PermissionResult
private static int checkPermission(@NonNull Context context,
@NonNull PermissionManagerServiceInternal permissionManagerServiceInt,
@NonNull String permission, @NonNull AttributionSource attributionSource,
@Nullable String message, boolean forDataDelivery, boolean startDataDelivery,
boolean fromDatasource, int attributedOp) {
PermissionInfo permissionInfo = sPlatformPermissions.get(permission);
if (permissionInfo == null) {
try {
permissionInfo = context.getPackageManager().getPermissionInfo(permission, 0);
if (PLATFORM_PACKAGE_NAME.equals(permissionInfo.packageName)) {
// Double addition due to concurrency is fine - the backing
// store is concurrent.
sPlatformPermissions.put(permission, permissionInfo);
}
} catch (PackageManager.NameNotFoundException ignored) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
}
if (permissionInfo.isAppOp()) {
return checkAppOpPermission(context, permissionManagerServiceInt, permission,
attributionSource, message, forDataDelivery, fromDatasource);
}
if (permissionInfo.isRuntime()) {
return checkRuntimePermission(context, permissionManagerServiceInt, permission,
attributionSource, message, forDataDelivery, startDataDelivery,
fromDatasource, attributedOp);
}
if (!fromDatasource && !checkPermission(context, permissionManagerServiceInt,
permission, attributionSource.getUid(),
attributionSource.getRenouncedPermissions())) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
if (attributionSource.getNext() != null) {
return checkPermission(context, permissionManagerServiceInt, permission,
attributionSource.getNext(), message, forDataDelivery, startDataDelivery,
/*fromDatasource*/ false, attributedOp);
}
return PermissionChecker.PERMISSION_GRANTED;
}
@PermissionCheckerManager.PermissionResult
private static int checkAppOpPermission(@NonNull Context context,
@NonNull PermissionManagerServiceInternal permissionManagerServiceInt,
@NonNull String permission, @NonNull AttributionSource attributionSource,
@Nullable String message, boolean forDataDelivery, boolean fromDatasource) {
final int op = AppOpsManager.permissionToOpCode(permission);
if (op < 0) {
Slog.wtf(LOG_TAG, "Appop permission " + permission + " with no app op defined!");
return PermissionChecker.PERMISSION_HARD_DENIED;
}
AttributionSource current = attributionSource;
AttributionSource next = null;
while (true) {
final boolean skipCurrentChecks = (fromDatasource || next != null);
next = current.getNext();
// If the call is from a datasource we need to vet only the chain before it. This
// way we can avoid the datasource creating an attribution context for every call.
if (!(fromDatasource && current.equals(attributionSource))
&& next != null && !current.isTrusted(context)) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
// The access is for oneself if this is the single receiver of data
// after the data source or if this is the single attribution source
// in the chain if not from a datasource.
final boolean singleReceiverFromDatasource = (fromDatasource
&& current.equals(attributionSource) && next != null
&& next.getNext() == null);
final boolean selfAccess = singleReceiverFromDatasource || next == null;
final int opMode = performOpTransaction(context, op, current, message,
forDataDelivery, /*startDataDelivery*/ false, skipCurrentChecks,
selfAccess, singleReceiverFromDatasource, AppOpsManager.OP_NONE,
AppOpsManager.ATTRIBUTION_FLAGS_NONE, AppOpsManager.ATTRIBUTION_FLAGS_NONE,
AppOpsManager.ATTRIBUTION_CHAIN_ID_NONE);
switch (opMode) {
case AppOpsManager.MODE_IGNORED:
case AppOpsManager.MODE_ERRORED: {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
case AppOpsManager.MODE_DEFAULT: {
if (!skipCurrentChecks && !checkPermission(context,
permissionManagerServiceInt, permission, attributionSource.getUid(),
attributionSource.getRenouncedPermissions())) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
if (next != null && !checkPermission(context, permissionManagerServiceInt,
permission, next.getUid(), next.getRenouncedPermissions())) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
}
}
if (next == null || next.getNext() == null) {
return PermissionChecker.PERMISSION_GRANTED;
}
current = next;
}
}
private static int checkRuntimePermission(@NonNull Context context,
@NonNull PermissionManagerServiceInternal permissionManagerServiceInt,
@NonNull String permission, @NonNull AttributionSource attributionSource,
@Nullable String message, boolean forDataDelivery, boolean startDataDelivery,
boolean fromDatasource, int attributedOp) {
// Now let's check the identity chain...
final int op = AppOpsManager.permissionToOpCode(permission);
final int attributionChainId =
getAttributionChainId(startDataDelivery, attributionSource);
final boolean hasChain = attributionChainId != ATTRIBUTION_CHAIN_ID_NONE;
AttributionSource current = attributionSource;
AttributionSource next = null;
// We consider the chain trusted if the start node has UPDATE_APP_OPS_STATS, and
// every attributionSource in the chain is registered with the system.
final boolean isChainStartTrusted = !hasChain || checkPermission(context,
permissionManagerServiceInt, UPDATE_APP_OPS_STATS, current.getUid(),
current.getRenouncedPermissions());
while (true) {
final boolean skipCurrentChecks = (fromDatasource || next != null);
next = current.getNext();
// If the call is from a datasource we need to vet only the chain before it. This
// way we can avoid the datasource creating an attribution context for every call.
if (!(fromDatasource && current.equals(attributionSource))
&& next != null && !current.isTrusted(context)) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
// If we already checked the permission for this one, skip the work
if (!skipCurrentChecks && !checkPermission(context, permissionManagerServiceInt,
permission, current.getUid(), current.getRenouncedPermissions())) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
if (next != null && !checkPermission(context, permissionManagerServiceInt,
permission, next.getUid(), next.getRenouncedPermissions())) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
if (op < 0) {
// Bg location is one-off runtime modifier permission and has no app op
if (sPlatformPermissions.contains(permission)
&& !Manifest.permission.ACCESS_BACKGROUND_LOCATION.equals(permission)) {
Slog.wtf(LOG_TAG, "Platform runtime permission " + permission
+ " with no app op defined!");
}
if (next == null) {
return PermissionChecker.PERMISSION_GRANTED;
}
current = next;
continue;
}
// The access is for oneself if this is the single receiver of data
// after the data source or if this is the single attribution source
// in the chain if not from a datasource.
final boolean singleReceiverFromDatasource = (fromDatasource
&& current.equals(attributionSource)
&& next != null && next.getNext() == null);
final boolean selfAccess = singleReceiverFromDatasource || next == null;
final boolean isLinkTrusted = isChainStartTrusted
&& (current.isTrusted(context) || current.equals(attributionSource))
&& (next == null || next.isTrusted(context));
final int proxyAttributionFlags = (!skipCurrentChecks && hasChain)
? resolveProxyAttributionFlags(attributionSource, current, fromDatasource,
startDataDelivery, selfAccess, isLinkTrusted)
: ATTRIBUTION_FLAGS_NONE;
final int proxiedAttributionFlags = hasChain ? resolveProxiedAttributionFlags(
attributionSource, next, fromDatasource, startDataDelivery, selfAccess,
isLinkTrusted) : ATTRIBUTION_FLAGS_NONE;
final int opMode = performOpTransaction(context, op, current, message,
forDataDelivery, startDataDelivery, skipCurrentChecks, selfAccess,
singleReceiverFromDatasource, attributedOp, proxyAttributionFlags,
proxiedAttributionFlags, attributionChainId);
switch (opMode) {
case AppOpsManager.MODE_ERRORED: {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
case AppOpsManager.MODE_IGNORED: {
return PermissionChecker.PERMISSION_SOFT_DENIED;
}
}
if (startDataDelivery) {
RegisteredAttribution registered = new RegisteredAttribution(context, op,
current, fromDatasource);
sRunningAttributionSources.put(current.getToken(), registered);
}
if (next == null || next.getNext() == null) {
return PermissionChecker.PERMISSION_GRANTED;
}
current = next;
}
}
private static boolean checkPermission(@NonNull Context context,
@NonNull PermissionManagerServiceInternal permissionManagerServiceInt,
@NonNull String permission, int uid, @NonNull Set<String> renouncedPermissions) {
boolean permissionGranted = context.checkPermission(permission, /*pid*/ -1,
uid) == PackageManager.PERMISSION_GRANTED;
// Override certain permissions checks for the HotwordDetectionService. This service is
// an isolated service, which ordinarily cannot hold permissions.
// There's probably a cleaner, more generalizable way to do this. For now, this is
// the only use case for this, so simply override here.
if (!permissionGranted
&& Process.isIsolated(uid) // simple check which fails-fast for the common case
&& (permission.equals(RECORD_AUDIO)
|| permission.equals(CAPTURE_AUDIO_HOTWORD))) {
HotwordDetectionServiceProvider hotwordServiceProvider =
permissionManagerServiceInt.getHotwordDetectionServiceProvider();
permissionGranted = hotwordServiceProvider != null
&& uid == hotwordServiceProvider.getUid();
}
if (permissionGranted && renouncedPermissions.contains(permission)
&& context.checkPermission(Manifest.permission.RENOUNCE_PERMISSIONS,
/*pid*/ -1, uid) == PackageManager.PERMISSION_GRANTED) {
return false;
}
return permissionGranted;
}
private static @AttributionFlags int resolveProxyAttributionFlags(
@NonNull AttributionSource attributionChain,
@NonNull AttributionSource current, boolean fromDatasource,
boolean startDataDelivery, boolean selfAccess, boolean isTrusted) {
return resolveAttributionFlags(attributionChain, current, fromDatasource,
startDataDelivery, selfAccess, isTrusted, /*flagsForProxy*/ true);
}
private static @AttributionFlags int resolveProxiedAttributionFlags(
@NonNull AttributionSource attributionChain,
@NonNull AttributionSource current, boolean fromDatasource,
boolean startDataDelivery, boolean selfAccess, boolean isTrusted) {
return resolveAttributionFlags(attributionChain, current, fromDatasource,
startDataDelivery, selfAccess, isTrusted, /*flagsForProxy*/ false);
}
private static @AttributionFlags int resolveAttributionFlags(
@NonNull AttributionSource attributionChain,
@NonNull AttributionSource current, boolean fromDatasource,
boolean startDataDelivery, boolean selfAccess, boolean isTrusted,
boolean flagsForProxy) {
if (current == null || !startDataDelivery) {
return AppOpsManager.ATTRIBUTION_FLAGS_NONE;
}
int trustedFlag = isTrusted
? AppOpsManager.ATTRIBUTION_FLAG_TRUSTED : AppOpsManager.ATTRIBUTION_FLAGS_NONE;
if (flagsForProxy) {
if (selfAccess) {
return trustedFlag | AppOpsManager.ATTRIBUTION_FLAG_ACCESSOR;
} else if (!fromDatasource && current.equals(attributionChain)) {
return trustedFlag | AppOpsManager.ATTRIBUTION_FLAG_ACCESSOR;
}
} else {
if (selfAccess) {
return trustedFlag | AppOpsManager.ATTRIBUTION_FLAG_RECEIVER;
} else if (fromDatasource && current.equals(attributionChain.getNext())) {
return trustedFlag | AppOpsManager.ATTRIBUTION_FLAG_ACCESSOR;
} else if (current.getNext() == null) {
return trustedFlag | AppOpsManager.ATTRIBUTION_FLAG_RECEIVER;
}
}
if (fromDatasource && current.equals(attributionChain)) {
return AppOpsManager.ATTRIBUTION_FLAGS_NONE;
}
return trustedFlag | AppOpsManager.ATTRIBUTION_FLAG_INTERMEDIARY;
}
private static int checkOp(@NonNull Context context, @NonNull int op,
@NonNull PermissionManagerServiceInternal permissionManagerServiceInt,
@NonNull AttributionSource attributionSource, @Nullable String message,
boolean forDataDelivery, boolean startDataDelivery) {
if (op < 0 || attributionSource.getPackageName() == null) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
final int attributionChainId =
getAttributionChainId(startDataDelivery, attributionSource);
final boolean hasChain = attributionChainId != ATTRIBUTION_CHAIN_ID_NONE;
AttributionSource current = attributionSource;
AttributionSource next = null;
// We consider the chain trusted if the start node has UPDATE_APP_OPS_STATS, and
// every attributionSource in the chain is registered with the system.
final boolean isChainStartTrusted = !hasChain || checkPermission(context,
permissionManagerServiceInt, UPDATE_APP_OPS_STATS, current.getUid(),
current.getRenouncedPermissions());
while (true) {
final boolean skipCurrentChecks = (next != null);
next = current.getNext();
// If the call is from a datasource we need to vet only the chain before it. This
// way we can avoid the datasource creating an attribution context for every call.
if (next != null && !current.isTrusted(context)) {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
// The access is for oneself if this is the single attribution source in the chain.
final boolean selfAccess = (next == null);
final boolean isLinkTrusted = isChainStartTrusted
&& (current.isTrusted(context) || current.equals(attributionSource))
&& (next == null || next.isTrusted(context));
final int proxyAttributionFlags = (!skipCurrentChecks && hasChain)
? resolveProxyAttributionFlags(attributionSource, current,
/*fromDatasource*/ false, startDataDelivery, selfAccess,
isLinkTrusted) : ATTRIBUTION_FLAGS_NONE;
final int proxiedAttributionFlags = hasChain ? resolveProxiedAttributionFlags(
attributionSource, next, /*fromDatasource*/ false, startDataDelivery,
selfAccess, isLinkTrusted) : ATTRIBUTION_FLAGS_NONE;
final int opMode = performOpTransaction(context, op, current, message,
forDataDelivery, startDataDelivery, skipCurrentChecks, selfAccess,
/*fromDatasource*/ false, AppOpsManager.OP_NONE, proxyAttributionFlags,
proxiedAttributionFlags, attributionChainId);
switch (opMode) {
case AppOpsManager.MODE_ERRORED: {
return PermissionChecker.PERMISSION_HARD_DENIED;
}
case AppOpsManager.MODE_IGNORED: {
return PermissionChecker.PERMISSION_SOFT_DENIED;
}
}
if (next == null || next.getNext() == null) {
return PermissionChecker.PERMISSION_GRANTED;
}
current = next;
}
}
@SuppressWarnings("ConstantConditions")
private static int performOpTransaction(@NonNull Context context, int op,
@NonNull AttributionSource attributionSource, @Nullable String message,
boolean forDataDelivery, boolean startDataDelivery, boolean skipProxyOperation,
boolean selfAccess, boolean singleReceiverFromDatasource, int attributedOp,
@AttributionFlags int proxyAttributionFlags,
@AttributionFlags int proxiedAttributionFlags, int attributionChainId) {
// We cannot perform app ops transactions without a package name. In all relevant
// places we pass the package name but just in case there is a bug somewhere we
// do a best effort to resolve the package from the UID (pick first without a loss
// of generality - they are in the same security sandbox).
final AppOpsManager appOpsManager = context.getSystemService(AppOpsManager.class);
final AttributionSource accessorSource = (!singleReceiverFromDatasource)
? attributionSource : attributionSource.getNext();
if (!forDataDelivery) {
final String resolvedAccessorPackageName = resolvePackageName(context,
accessorSource);
if (resolvedAccessorPackageName == null) {
return AppOpsManager.MODE_ERRORED;
}
final int opMode = appOpsManager.unsafeCheckOpRawNoThrow(op,
accessorSource.getUid(), resolvedAccessorPackageName);
final AttributionSource next = accessorSource.getNext();
if (!selfAccess && opMode == AppOpsManager.MODE_ALLOWED && next != null) {
final String resolvedNextPackageName = resolvePackageName(context, next);
if (resolvedNextPackageName == null) {
return AppOpsManager.MODE_ERRORED;
}
return appOpsManager.unsafeCheckOpRawNoThrow(op, next.getUid(),
resolvedNextPackageName);
}
return opMode;
} else if (startDataDelivery) {
final AttributionSource resolvedAttributionSource = resolveAttributionSource(
context, accessorSource);
if (resolvedAttributionSource.getPackageName() == null) {
return AppOpsManager.MODE_ERRORED;
}
// If the datasource is not in a trusted platform component then in would not
// have UPDATE_APP_OPS_STATS and the call below would fail. The problem is that
// an app is exposing runtime permission protected data but cannot blame others
// in a trusted way which would not properly show in permission usage UIs.
// As a fallback we note a proxy op that blames the app and the datasource.
int startedOp = op;
int checkedOpResult = MODE_ALLOWED;
int startedOpResult;
// If the datasource wants to attribute to another app op we need to
// make sure the op for the permission and the attributed ops allow
// the operation. We return the less permissive of the two and check
// the permission op while start the attributed op.
if (attributedOp != AppOpsManager.OP_NONE && attributedOp != op) {
checkedOpResult = appOpsManager.checkOpNoThrow(op,
resolvedAttributionSource.getUid(), resolvedAttributionSource
.getPackageName());
if (checkedOpResult == MODE_ERRORED) {
return checkedOpResult;
}
startedOp = attributedOp;
}
if (selfAccess) {
try {
startedOpResult = appOpsManager.startOpNoThrow(
resolvedAttributionSource.getToken(), startedOp,
resolvedAttributionSource.getUid(),
resolvedAttributionSource.getPackageName(),
/*startIfModeDefault*/ false,
resolvedAttributionSource.getAttributionTag(),
message, proxyAttributionFlags, attributionChainId);
} catch (SecurityException e) {
Slog.w(LOG_TAG, "Datasource " + attributionSource + " protecting data with"
+ " platform defined runtime permission "
+ AppOpsManager.opToPermission(op) + " while not having "
+ Manifest.permission.UPDATE_APP_OPS_STATS);
startedOpResult = appOpsManager.startProxyOpNoThrow(attributedOp,
attributionSource, message, skipProxyOperation,
proxyAttributionFlags, proxiedAttributionFlags, attributionChainId);
}
} else {
startedOpResult = appOpsManager.startProxyOpNoThrow(startedOp,
resolvedAttributionSource, message, skipProxyOperation,
proxyAttributionFlags, proxiedAttributionFlags, attributionChainId);
}
return Math.max(checkedOpResult, startedOpResult);
} else {
final AttributionSource resolvedAttributionSource = resolveAttributionSource(
context, accessorSource);
if (resolvedAttributionSource.getPackageName() == null) {
return AppOpsManager.MODE_ERRORED;
}
int notedOp = op;
int checkedOpResult = MODE_ALLOWED;
int notedOpResult;
// If the datasource wants to attribute to another app op we need to
// make sure the op for the permission and the attributed ops allow
// the operation. We return the less permissive of the two and check
// the permission op while start the attributed op.
if (attributedOp != AppOpsManager.OP_NONE && attributedOp != op) {
checkedOpResult = appOpsManager.checkOpNoThrow(op,
resolvedAttributionSource.getUid(), resolvedAttributionSource
.getPackageName());
if (checkedOpResult == MODE_ERRORED) {
return checkedOpResult;
}
notedOp = attributedOp;
}
if (selfAccess) {
// If the datasource is not in a trusted platform component then in would not
// have UPDATE_APP_OPS_STATS and the call below would fail. The problem is that
// an app is exposing runtime permission protected data but cannot blame others
// in a trusted way which would not properly show in permission usage UIs.
// As a fallback we note a proxy op that blames the app and the datasource.
try {
notedOpResult = appOpsManager.noteOpNoThrow(notedOp,
resolvedAttributionSource.getUid(),
resolvedAttributionSource.getPackageName(),
resolvedAttributionSource.getAttributionTag(),
message);
} catch (SecurityException e) {
Slog.w(LOG_TAG, "Datasource " + attributionSource + " protecting data with"
+ " platform defined runtime permission "
+ AppOpsManager.opToPermission(op) + " while not having "
+ Manifest.permission.UPDATE_APP_OPS_STATS);
notedOpResult = appOpsManager.noteProxyOpNoThrow(notedOp, attributionSource,
message, skipProxyOperation);
}
} else {
notedOpResult = appOpsManager.noteProxyOpNoThrow(notedOp,
resolvedAttributionSource, message, skipProxyOperation);
}
return Math.max(checkedOpResult, notedOpResult);
}
}
private static int getAttributionChainId(boolean startDataDelivery,
AttributionSource source) {
if (source == null || source.getNext() == null || !startDataDelivery) {
return AppOpsManager.ATTRIBUTION_CHAIN_ID_NONE;
}
int attributionChainId = sAttributionChainIds.incrementAndGet();
// handle overflow
if (attributionChainId < 0) {
attributionChainId = 0;
sAttributionChainIds.set(0);
}
return attributionChainId;
}
private static @Nullable String resolvePackageName(@NonNull Context context,
@NonNull AttributionSource attributionSource) {
if (attributionSource.getPackageName() != null) {
return attributionSource.getPackageName();
}
final String[] packageNames = context.getPackageManager().getPackagesForUid(
attributionSource.getUid());
if (packageNames != null) {
// This is best effort if the caller doesn't pass a package. The security
// sandbox is UID, therefore we pick an arbitrary package.
return packageNames[0];
}
// Last resort to handle special UIDs like root, etc.
return AppOpsManager.resolvePackageName(attributionSource.getUid(),
attributionSource.getPackageName());
}
private static @NonNull AttributionSource resolveAttributionSource(
@NonNull Context context, @NonNull AttributionSource attributionSource) {
if (attributionSource.getPackageName() != null) {
return attributionSource;
}
return attributionSource.withPackageName(resolvePackageName(context,
attributionSource));
}
}
private static final class RegisteredAttribution {
private final DeathRecipient mDeathRecipient;
private final IBinder mToken;
private final AtomicBoolean mFinished;
RegisteredAttribution(Context context, int op, AttributionSource source,
boolean fromDatasource) {
mFinished = new AtomicBoolean(false);
mDeathRecipient = () -> {
if (unregister()) {
PermissionCheckerService
.finishDataDelivery(context, op, source.asState(), fromDatasource);
}
};
mToken = source.getToken();
if (mToken != null) {
try {
mToken.linkToDeath(mDeathRecipient, 0);
} catch (RemoteException e) {
mDeathRecipient.binderDied();
}
}
}
public boolean unregister() {
if (mFinished.compareAndSet(false, true)) {
try {
if (mToken != null) {
mToken.unlinkToDeath(mDeathRecipient, 0);
}
} catch (NoSuchElementException e) {
// do nothing
}
return true;
}
return false;
}
}
}