c# des方式加密解密完整代码

c# des方式加密解密完整代码, 创建class 类 ，讲下面代码粘贴进去就可以直接 使用

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

namespace DecryptCode
{
public class Decrypt
{
private static readonly string DESIV = “itemperor”;

    /// <summary>
    /// Des加密
    /// </summary>
    /// <param name="originalValue"></param>
    /// <param name="key"></param>
    /// <returns></returns>
    public static string DESEncrypt(string originalValue, string key)
    {
        string result;
        try
        {
            key += "51jrft";
            key = key.Substring(0, 8);
            ICryptoTransform transform = new DESCryptoServiceProvider
            {
                Key = Encoding.UTF8.GetBytes(key),
                IV = Encoding.UTF8.GetBytes(HisDecrypt.DESIV)
            }.CreateEncryptor();
            byte[] bytes = Encoding.UTF8.GetBytes(originalValue);
            MemoryStream memoryStream = new MemoryStream();
            CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Write);
            cryptoStream.Write(bytes, 0, bytes.Length);
            cryptoStream.FlushFinalBlock();
            cryptoStream.Close();
            result = Convert.ToBase64String(memoryStream.ToArray());
        }
        catch
        {
            result = originalValue;
        }
        return result;
    }
    
    /// <summary>
    /// Des解密
    /// </summary>
    /// <param name="originalValue"></param>
    /// <param name="key"></param>
    /// <returns></returns>
    public static string DESDecrypt(string encryptedValue, string key)
    {
        string result;
        try
        {
            key += "51jrft";
            key = key.Substring(0, 8);
            ICryptoTransform transform = new DESCryptoServiceProvider
            {
                Key = Encoding.UTF8.GetBytes(key),
                IV = Encoding.UTF8.GetBytes(HisDecrypt.DESIV)
            }.CreateDecryptor();
            byte[] array = Convert.FromBase64String(encryptedValue);
            MemoryStream memoryStream = new MemoryStream();
            CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Write);
            cryptoStream.Write(array, 0, array.Length);
            cryptoStream.FlushFinalBlock();
            cryptoStream.Close();
            result = Encoding.UTF8.GetString(memoryStream.ToArray());
        }
        catch
        {
            result = encryptedValue;
        }
        return result;
    }
}

}

原文链接:http://www.51jrft.com/jlmb/Others/23989.html