计算文件SHA1哈希值

admin管理员组

文章数量:1530516

2023年12月12日发(作者：)

计算文件SHA1哈希值

Computes the hash for the input data using the managed library.

使用托管库为输入数据计算SHA1哈希。

1. 需求为：为指定文件计算 SHA1哈希值

using System;

using ;

using graphy;

public class HashDirectory

{

public static void Main(String[] args)

{

//文件路径

string directory = "E:/";

//计算输入文件的SHA1哈希值

string sha1Hash = GetSha1Hash(directory);

//输出哈希值或异常信息

ine(sha1Hash);

}

// Display the byte array in a readable format.

public static string PrintByteArray(byte[] array)

{

string sHA1string = "";

for (int i = 0; i < ; i++)

{

sHA1string += $"{array[i]:x2}";

}

return sHA1string;

}

// Computes the SHA1 hash for the input data using the managed library.

public static string GetSha1Hash(string dir)

{

FileInfo fileInfo = new FileInfo(dir);

// Initialize a SHA1 hash object.

using (SHA1Managed sHA1 = new SHA1Managed())

{

try

{

// Create a fileStream for the file.

FileStream fileStream = ();

// Be sure it's positioned to the beginning of the stream.

on = 0;

// Compute the hash of the fileStream.

byte[] hashValue = eHash(fileStream);

// Write the name and hash value of the file to the console.

($"{}: ");

string sHA1string = PrintByteArray(hashValue);

ine(sHA1string);

// Close the file.

();

return sHA1string;

}

catch (IOException e)

{

return ($"I/O Exception: {e}");

}

catch (UnauthorizedAccessException e)

{

{

return ($"Access Exception: {e}");

}

}

}

}

2.

1. 以上为 SHA1算法，巨硬官网很多例子都是 SHA256算法。安全性方面，显然SHA256（又称SHA2）的安全性最高，但是耗

时要比其他两种多很多。MD5相对较容易碰撞，因此，SHA1应该是这三种中性能最好的一款加密算法。

2. The hash size for the SHA1 algorithm is 160 bits.

3. Due to collision problems with SHA1, Microsoft recommends a security model based on SHA256 or better.

3.

本文标签： 计算文件算法官网输入