57 lines
2.3 KiB
Java
57 lines
2.3 KiB
Java
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/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.permission.util;
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import android.annotation.NonNull;
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import android.annotation.UserIdInt;
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import android.content.Context;
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import android.os.Binder;
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import android.os.Process;
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import android.os.UserHandle;
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import android.os.UserManager;
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import com.android.internal.util.Preconditions;
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import com.android.permission.compat.UserHandleCompat;
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/** Utility class to deal with Android permissions. */
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public final class PermissionUtils {
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private PermissionUtils() {}
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/** Enforces cross user permission for the calling UID and the given {@code userId}. */
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public static void enforceCrossUserPermission(@UserIdInt int userId, boolean allowAll,
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@NonNull String message, @NonNull Context context) {
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final int callingUid = Binder.getCallingUid();
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final int callingUserId = UserHandleCompat.getUserId(callingUid);
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if (userId == callingUserId) {
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return;
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}
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Preconditions.checkArgument(userId >= UserHandleCompat.USER_SYSTEM
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context.enforceCallingOrSelfPermission(
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android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, message);
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if (callingUid == Process.SHELL_UID && userId >= UserHandleCompat.USER_SYSTEM) {
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UserManager userManager = context.getSystemService(UserManager.class);
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if (userManager.hasUserRestrictionForUser(UserManager.DISALLOW_DEBUGGING_FEATURES,
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UserHandle.of(userId))) {
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throw new SecurityException("Shell does not have permission to access user "
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+ userId);
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}
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}
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}
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}
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