1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *    http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #include "hks_crypto_hal_common.h"
17 
HexChar(char hex) const18 uint8_t HksCryptoHalCommon::HexChar(char hex) const
19 {
20     if (hex >= '0' && hex <= '9') {
21         return hex - '0';
22     } else if (hex >= 'A' && hex <= 'F') {
23         return hex - 'A' + 0X0A;
24     } else if (hex >= 'a' && hex <= 'f') {
25         return hex - 'a' + 0X0A;
26     } else {
27         return 0;
28     }
29 }
30 
ReadHex(const uint8_t hex[2]) const31 uint8_t HksCryptoHalCommon::ReadHex(const uint8_t hex[2]) const
32 {
33     return HexChar(*hex) * 16 + HexChar(*(hex + 1));
34 }