C# .Net 的加密（DES加密解密，MD5，SHA1）

最新推荐文章于 2025-05-14 09:38:55 发布

原创最新推荐文章于 2025-05-14 09:38:55 发布 · 1.1k 阅读

1 ·

CC 4.0 BY-SA版权

文章标签：

#SHA1 #md5 #加密 #解密

.net c# 专栏收录该内容

1 篇文章

订阅专栏

本文介绍了一个使用C#实现的DES加密和解密方法，同时提供了MD5及SHA1的密码散列函数实现。文章详细展示了如何利用这些算法进行数据保护。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

工作需要，以下分享给大家，老鸟飘过，勿喷

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

using System.Web.Security;

using System.Security.Cryptography;

namespace SellTicket
{
    class Encrypt
    {

        /// <summary>
        /// DES加密
        /// </summary>
        /// <param name="pToEncrypt"></param>
        /// <param name="sKey">8位</param>
        /// <returns></returns>
        public string DESEncrypt(string pToEncrypt, string sKey)
        {//using System.Security.Cryptography;

            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
            des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
            des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            StringBuilder ret = new StringBuilder();
            foreach (byte b in ms.ToArray())
            {
                ret.AppendFormat("{0:X2}", b);
            }
            ret.ToString();
            return ret.ToString();

        }

        /// <summary>
        /// DES解密
        /// </summary>
        /// <param name="pToDecrypt"></param>
        /// <param name="sKey">8位</param>
        /// <returns></returns>
        public string DESDecrypt(string pToDecrypt, string sKey)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();

            byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
            for (int x = 0; x < pToDecrypt.Length / 2; x++)
            {
                int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
                inputByteArray[x] = (byte)i;
            }

            des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
            des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            StringBuilder ret = new StringBuilder();

            return System.Text.Encoding.Default.GetString(ms.ToArray());
        }
        /// <summary>
        /// MD5 or SHA1
        /// </summary>
        /// <param name="password"></param>
        /// <param name="passwordformate">md5,SHA1</param>
        /// <returns></returns>
        public string OtherEncrypt(string password, string passwordformate)
        { 
            //using System.Web.Security;
            string encrypt = "";
            if ("md5".Equals(passwordformate.ToLower()))
                encrypt = FormsAuthentication.HashPasswordForStoringInConfigFile(password, "md5");
            if ("SHA1".Equals(passwordformate))
                encrypt = FormsAuthentication.HashPasswordForStoringInConfigFile(password, "SHA1");
            return encrypt;
        }
    }
}