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/*
* Copyright (C) 2023 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.
*/
#include <binder/IPCThreadState.h>
#include <gui/LayerStatePermissions.h>
#include <private/android_filesystem_config.h>
#ifndef __ANDROID_VNDK__
#include <binder/PermissionCache.h>
#endif // __ANDROID_VNDK__
#include <gui/LayerState.h>
namespace android {
std::vector<std::pair<String16, int>> LayerStatePermissions::mPermissionMap = {
// If caller has ACCESS_SURFACE_FLINGER, they automatically get ROTATE_SURFACE_FLINGER
// permission, as well
{String16("android.permission.ACCESS_SURFACE_FLINGER"),
layer_state_t::Permission::ACCESS_SURFACE_FLINGER |
layer_state_t::Permission::ROTATE_SURFACE_FLINGER},
{String16("android.permission.ROTATE_SURFACE_FLINGER"),
layer_state_t::Permission::ROTATE_SURFACE_FLINGER},
{String16("android.permission.INTERNAL_SYSTEM_WINDOW"),
layer_state_t::Permission::INTERNAL_SYSTEM_WINDOW},
};
static bool callingThreadHasPermission(const String16& permission __attribute__((unused)),
int pid __attribute__((unused)),
int uid __attribute__((unused))) {
#ifndef __ANDROID_VNDK__
return uid == AID_GRAPHICS || uid == AID_SYSTEM ||
PermissionCache::checkPermission(permission, pid, uid);
#endif // __ANDROID_VNDK__
return false;
}
uint32_t LayerStatePermissions::getTransactionPermissions(int pid, int uid) {
uint32_t permissions = 0;
for (const auto& [permissionName, permissionVal] : mPermissionMap) {
if (callingThreadHasPermission(permissionName, pid, uid)) {
permissions |= permissionVal;
}
}
return permissions;
}
} // namespace android
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