1 /*
2  * Copyright 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef TRUSTY_APP_KEYMASTER_SECOND_IMEI_ATTESTATION_H_
18 #define TRUSTY_APP_KEYMASTER_SECOND_IMEI_ATTESTATION_H_
19 
20 #include <hardware/keymaster_defs.h>
21 
22 namespace keymaster {
23 
24 // Calculate the Luhn checksum of a given number.
25 uint8_t calculate_luhn_checksum_digit(uint64_t val);
26 
27 // Given a first_imei, return true if the received_second_imei is
28 // a subsequent IMEI of the first_imei.
29 bool validate_second_imei(const keymaster_blob_t& received_second_imei,
30                           uint64_t first_imei);
31 
32 }  // namespace keymaster
33 
34 #endif  // TRUSTY_APP_KEYMASTER_SECOND_IMEI_ATTESTATION_H_
35