DES加密

最新推荐文章于 2024-10-11 17:53:08 发布

转载最新推荐文章于 2024-10-11 17:53:08 发布 · 529 阅读

本文介绍如何使用C#中的DESCryptoServiceProvider类进行DES加密和解密操作，并提供了完整的代码示例。

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原来.net类库里面早就把des加密和解密封装好了

命名空间是 using System.Security.Cryptography;

类名是 DESCryptoServiceProvider

然后你查查msdn就有例子了

下面是我在网上看到的一段代码（C#语言描述）：

using System;
using System.Text;
using System.Security.Cryptography;

namespace des_test_1
{
    class Program
    {
        static void Main(string[] args)
        {
            string key = DES.GenerateKey();
            string s0 = "妹子最漂亮了，嘻嘻";
            string s1 = DES.Encrypt(s0, key);
            string s2 = DES.Decrypt(s1, key);
            Console.WriteLine(s1 + "  ,  " + s2);
            Console.Read();
        }
    }


    


public class DES
{

    /// <summary>
    /// 进行DES加密。
    /// </summary>
    /// <param name="pToEncrypt">要加密的字符串。</param>
    /// <param name="sKey">密钥，且必须为8位。</param>
    /// <returns>以Base64格式返回的加密字符串。</returns>
    public static string Encrypt(string pToEncrypt, string sKey)
    {
        using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
        {
            byte[] inputByteArray = Encoding.UTF8.GetBytes(pToEncrypt);
            des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
            des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))
            {
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                cs.Close();
            }
            string str = Convert.ToBase64String(ms.ToArray());
            ms.Close();
            return str;
        }
    }

    /// <summary>
    /// 进行DES解密。
    /// </summary>
    /// <param name="pToDecrypt">要解密的以Base64</param>
    /// <param name="sKey">密钥，且必须为8位。</param>
    /// <returns>已解密的字符串。</returns>
    public static string Decrypt(string pToDecrypt, string sKey)
    {
        byte[] inputByteArray = Convert.FromBase64String(pToDecrypt);
        using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
        {
            des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
            des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
            System.IO.MemoryStream ms = new System.IO.MemoryStream();
            using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write))
            {
                cs.Write(inputByteArray, 0, inputByteArray.Length);
                cs.FlushFinalBlock();
                cs.Close();
            }
            string str = Encoding.UTF8.GetString(ms.ToArray());
            ms.Close();
            return str;
        }
    }    
    
    /// <summary>
    /// 创建密钥
    /// </summary>
    /// <returns></returns>
    public static string GenerateKey()
    {
        DESCryptoServiceProvider desCrypto = (DESCryptoServiceProvider)DESCryptoServiceProvider.Create();
        return ASCIIEncoding.ASCII.GetString(desCrypto.Key);
    }
}



}

直接复制就可以运行了！

引用资料：

http://www.cnblogs.com/bjarner/archive/2010/01/28/1657980.html

http://kweenzy.blog.51cto.com/1093584/1008506