/*

 * Copyright (c) 2021 Huawei Device Co., Ltd.

 * 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.

 */



/*

 * Description: 计算文件SHA256校验和的基本方法

 */



#ifndef CHECKSUM_SHA256_H

#define CHECKSUM_SHA256_H



// 信息摘要结构体

typedef struct {

    unsigned char data[64]; // 消息数据块

    unsigned int dataLen; // 消息数据块长度

    unsigned long long bitLen; // 信息的字节长度

    unsigned int hash[8]; // 哈希值

} MesgDigest;



void InitSha256(MesgDigest *md);

void CalcSha256(MesgDigest *md, unsigned char *mesg);



#endif // CHECKSUM_SHA256_H