second_imei_attestation.h

/*
 * Copyright 2022 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.
 */

#ifndef TRUSTY_APP_KEYMASTER_SECOND_IMEI_ATTESTATION_H_
#define TRUSTY_APP_KEYMASTER_SECOND_IMEI_ATTESTATION_H_

#include <hardware/keymaster_defs.h>

namespace keymaster {

// Calculate the Luhn checksum of a given number.
uint8_t calculate_luhn_checksum_digit(uint64_t val);

// Given a first_imei, return true if the received_second_imei is
// a subsequent IMEI of the first_imei.
bool validate_second_imei(const keymaster_blob_t& received_second_imei,
                          uint64_t first_imei);

}  // namespace keymaster

#endif  // TRUSTY_APP_KEYMASTER_SECOND_IMEI_ATTESTATION_H_