用开源的算法代替openssl里面的sha1算法

最新推荐文章于 2025-06-01 12:14:14 发布

一路阳光随行

最新推荐文章于 2025-06-01 12:14:14 发布

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分类专栏： C/C++

本文链接：https://blog.youkuaiyun.com/wuchuanpingstone/article/details/78094363

本文介绍如何不依赖libcrypto.so库，而是采用开源的SHA1算法编译到代码中，以实现文件摘要的生成。提供了相关代码示例。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

有时候不想直接调用系统中自带的sha1的算法，从网上找了开源的sha1，将其编译到自己的代码中，这样可以省去对库libcrypto.so的引用。可直接下载代码

代码如下：

sha1.h:

#ifndef _SHA1_H_
#define _SHA1_H_

/* 
 *  This structure will hold context information for the hashing
 *  operation
 */
typedef struct SHA1Context
{
    unsigned Message_Digest[5]; /* Message Digest (output)          */

    unsigned Length_Low;        /* Message length in bits           */
    unsigned Length_High;       /* Message length in bits           */

    unsigned char Message_Block[64]; /* 512-bit message blocks      */
    int Message_Block_Index;    /* Index into message block array   */

    int Computed;               /* Is the digest computed?          */
    int Corrupted;              /* Is the message digest corruped?  */
} SHA1Context;

/*
 *  Function Prototypes
 */
void SHA1Reset(SHA1Context *);
int SHA1Result(SHA1Context *);
void SHA1Input( SHA1Context *,
                const unsigned char *,
                unsigned);

#endif

sha1.c

#include "sha1.h"

/*
 *  Define the circular shift macro
 */
#define SHA1CircularShift(bits,word) \
                ((((word) << (bits)) & 0xFFFFFFFF) | \
                ((word) >> (32-(bits))))

/* Function prototypes */
void SHA1ProcessMessageBlock(SHA1Context *);
void SHA1PadMessage(SHA1Context *);

/*  
 *  SHA1Reset
 *
 *  Description:
 *      This function will initialize the SHA1Context in preparation
 *      for computing a new message digest.
 *
 *  Parameters:
 *      context: [in/out]
 *          The context to reset.
 *
 *  Returns:
 *      Nothing.
 *
 *  Comments:
 *
 */
void SHA1Reset(SHA1Context *context)
{
    context->Length_Low             = 0;
    context->Length_High            = 0;
    context->Message_Block_Index    = 0;

    context->Message_Digest[0]      = 0x67452301;
    context->Message_Digest[1]      = 0xEFCDAB89;
    context->Message_Digest[2]      = 0x98BADCFE;
    context->Message_D