Line data    Source code

       1              : /*
       2              :  *    Copyright (c) 2024 Project CHIP Authors
       3              :  *    All rights reserved.
       4              :  *
       5              :  *    Licensed under the Apache License, Version 2.0 (the "License");
       6              :  *    you may not use this file except in compliance with the License.
       7              :  *    You may obtain a copy of the License at
       8              :  *
       9              :  *        http://www.apache.org/licenses/LICENSE-2.0
      10              :  *
      11              :  *    Unless required by applicable law or agreed to in writing, software
      12              :  *    distributed under the License is distributed on an "AS IS" BASIS,
      13              :  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      14              :  *    See the License for the specific language governing permissions and
      15              :  *    limitations under the License.
      16              :  */
      17              : 
      18              : /**
      19              :  * @brief The file implements the Matter Check-In counter
      20              :  */
      21              : 
      22              : #include <protocols/secure_channel/CheckInCounter.h>
      23              : #include <stdint.h>
      24              : 
      25              : namespace chip {
      26              : namespace Protocols {
      27              : namespace SecureChannel {
      28              : 
      29            3 : CHIP_ERROR CheckInCounter::InvalidateHalfCheckInCounterValues()
      30              : {
      31              :     // Increases the current counter value by half of its maximum range and updates underlying counter storage.
      32              :     // CheckInCounter is allowed to roll over.
      33            3 :     ReturnErrorOnFailure(AdvanceBy((UINT32_MAX / 2)));
      34            3 :     return CHIP_NO_ERROR;
      35              : }
      36              : 
      37            3 : CHIP_ERROR CheckInCounter::InvalidateAllCheckInCounterValues()
      38              : {
      39              :     // Increase current counter value by its maximum value to mimic N -> UINT32_MAX -> N-1 to invalidate all Check-In counter
      40              :     // values. CheckInCounter is allowed to roll over.
      41            3 :     ReturnErrorOnFailure(AdvanceBy(UINT32_MAX));
      42            3 :     return CHIP_NO_ERROR;
      43              : }
      44              : 
      45              : } // namespace SecureChannel
      46              : } // namespace Protocols
      47              : } // namespace chip