Hl.Code/CodeHelper.cs

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using System;
using System.Web;
using System.Text;
using System.Data;
using System.Security.Cryptography;
using System.IO;
using System.Web.Security;

namespace Hl.Code
{
    /// <summary>
    /// 编码帮助
    /// </summary>
    public class CodeHelper
    {
        #region DES加密解密

        /// <summary>
        /// 默认密钥向量 
        /// </summary>
        private static byte[] DESKey = {0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF};

        /// <summary>
        /// DES加密
        /// </summary>
        public static string DESEncrypt(string strSource)
        {
            return DESEncrypt(strSource, DESKey);
        }

        /// <summary>
        /// DES加密
        /// </summary>
        private static string DESEncrypt(string strSource, byte[] key)
        {
            SymmetricAlgorithm sa = Rijndael.Create();
            sa.Key = key;
            sa.Mode = CipherMode.ECB;
            sa.Padding = PaddingMode.Zeros;
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, sa.CreateEncryptor(), CryptoStreamMode.Write);
            byte[] byt = Encoding.Unicode.GetBytes(strSource);
            cs.Write(byt, 0, byt.Length);
            cs.FlushFinalBlock();
            cs.Close();
            return Convert.ToBase64String(ms.ToArray());
        }

        /// <summary>
        /// DES解密
        /// </summary>
        public static string DESDecrypt(string strSource)
        {
            return DESDecrypt(strSource, DESKey);
        }

        /// <summary>
        /// DES加密
        /// </summary>
        public static string DESDecrypt(string strSource, byte[] key)