datasecurity.cs

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

/// <summary>
/// DataSecurity 的摘要说明
/// </summary>
public class DataSecurity
{
	public DataSecurity()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}


    /// <summary>
    /// 解密字符串
    /// </summary>
    /// <param name="Value">要解密的值</param>
    /// <returns></returns>
    public static string DataDecrypt(string Value)
    {
        try
        {
            byte[] buffer1 = Convert.FromBase64String("I3aVylfBqho=");
            byte[] buffer2 = Convert.FromBase64String("jMmwueomlJg=");
            DESCryptoServiceProvider provider1 = new DESCryptoServiceProvider();
            provider1.Key = buffer1;
            provider1.IV = buffer2;
            ICryptoTransform transform1 = provider1.CreateDecryptor(provider1.Key, provider1.IV);
            byte[] buffer3 = Convert.FromBase64String(Value);
            MemoryStream stream1 = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream1, transform1, CryptoStreamMode.Write);
            stream2.Write(buffer3, 0, buffer3.Length);
            stream2.FlushFinalBlock();
            stream2.Close();
            return Encoding.UTF8.GetString(stream1.ToArray());
        }
        catch(System.Exception ex)
        {
            string msg = ex.Message;
            return "";
        }
    }



    /// <summary>
    /// 字符串加密
    /// </summary>
    /// <param name="Value">要加密的字符串</param>
    /// <returns></returns>
    public static string DataEncrypt(string Value)
    {
        try
        {
            byte[] buffer1 = Convert.FromBase64String("I3aVylfBqho=");
            byte[] buffer2 = Convert.FromBase64String("jMmwueomlJg=");
            DESCryptoServiceProvider provider1 = new DESCryptoServiceProvider();
            provider1.Key = buffer1;
            provider1.IV = buffer2;
            ICryptoTransform transform1 = provider1.CreateEncryptor(provider1.Key, provider1.IV);
            byte[] buffer3 = Encoding.UTF8.GetBytes(Value);
            MemoryStream stream1 = new MemoryStream();
            CryptoStream stream2 = new CryptoStream(stream1, transform1, CryptoStreamMode.Write);
            stream2.Write(buffer3, 0, buffer3.Length);
            stream2.FlushFinalBlock();
            stream2.Close();
            return Convert.ToBase64String(stream1.ToArray());
        }
        catch
        {
            return "";
        }
    }





}