C# 怎么进行 MD5 加密_C# MD5 加密实现教程

using System;
using System.Security.Cryptography;
using System.Text;
<p>public static string ComputeMD5(string input)
{
using (MD5 md5 = MD5.Create())
{
byte[] inputBytes = Encoding.UTF8.GetBytes(input);
byte[] hashBytes = md5.ComputeHash(inputBytes);</p><pre class="brush:php;toolbar:false;"><pre class="brush:php;toolbar:false;">    // 将哈希字节数组转换为十六进制字符串
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < hashBytes.Length; i++)
    {
        sb.Append(hashBytes[i].ToString("x2")); // x2 表示小写十六进制
    }
    return sb.ToString();
}

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
<p>public static string ComputeFileMD5(string filePath)
{
if (!File.Exists(filePath))
throw new FileNotFoundException("文件未找到", filePath);</p><pre class="brush:php;toolbar:false;"><pre class="brush:php;toolbar:false;">using (MD5 md5 = MD5.Create())
using (FileStream stream = File.OpenRead(filePath))
{
    byte[] hashBytes = md5.ComputeHash(stream);
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < hashBytes.Length; i++)
    {
        sb.Append(hashBytes[i].ToString("x2"));
    }
    return sb.ToString();
}

using (SHA256 sha256 = SHA256.Create())
{
    byte[] hash = sha256.ComputeHash(Encoding.UTF8.GetBytes(input));
    // 同样转为十六进制
}