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/*
17 * Description: 计算文件SHA256校验和的基本方法
18 */
19
20#ifndef CHECKSUM_SHA256_H
21#define CHECKSUM_SHA256_H
22
23// 信息摘要结构体
24typedef struct {
25    unsigned char data[64]; // 消息数据块
26    unsigned int dataLen; // 消息数据块长度
27    unsigned long long bitLen; // 信息的字节长度
28    unsigned int hash[8]; // 哈希值
29} MesgDigest;
30
31void InitSha256(MesgDigest *md);
32void CalcSha256(MesgDigest *md, unsigned char *mesg);
33
34#endif // CHECKSUM_SHA256_H
35