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 24 typedef 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 31 void InitSha256(MesgDigest *md); 32 void CalcSha256(MesgDigest *md, unsigned char *mesg); 33 34 #endif // CHECKSUM_SHA256_H 35