ASP.NET2.0 C#加密解密

Code
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Security;
using System.Security.Cryptography;
using System.IO;
using System.Text;
using System.Collections;
using System.Collections.Specialized;

namespace Intel.User.BLL
{
    public class TripleDES
    {
        public string EncryptionString = System.Configuration.ConfigurationSettings.AppSettings[\”encryptKey\”];
        public string EncryptionIV = System.Configuration.ConfigurationSettings.AppSettings[\”encryptIV\”];

        public byte[] EncryptionByteData(byte[] SourceData)
        {
            byte[] returnData = null;
            try
            {

TripleDESCryptoServiceProvider desProvider = new TripleDESCryptoServiceProvider();

                byte[] byteKey = Encoding.UTF8.GetBytes(EncryptionString);
                byte[] byteIV = Encoding.UTF8.GetBytes(EncryptionIV);
                desProvider.Key = byteKey;
                desProvider.IV = byteIV;

MemoryStream ms = new MemoryStream();

ICryptoTransform encrypto = desProvider.CreateEncryptor();

CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);

cs.Write(SourceData, 0, SourceData.Length);
cs.FlushFinalBlock();

                returnData = ms.ToArray();
            }
            catch (Exception ex)
            {
                throw ex;
            }

return returnData;

}

        public byte[] DecryptionByteData(byte[] SourceData)
        {
            byte[] returnData = null;
            try
            {

TripleDESCryptoServiceProvider desProvider = new TripleDESCryptoServiceProvider();

MemoryStream ms = new MemoryStream();

ICryptoTransform encrypto = desProvider.CreateDecryptor();

CryptoStream cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);

cs.Write(SourceData, 0, SourceData.Length);
cs.FlushFinalBlock();

                returnData = ms.ToArray();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return returnData;

}

        public string EncryptionStringData(string SourceData)
        {
            try
            {

byte[] SourData = Encoding.UTF8.GetBytes(SourceData);

byte[] retData = EncryptionByteData(SourData);

                return Convert.ToBase64String(retData, 0, retData.Length);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public string DecryptionStringdata(string SourceData)
        {
            try
            {

byte[] SourData = Convert.FromBase64String(SourceData);

byte[] retData = DecryptionByteData(SourData);

                return Encoding.UTF8.GetString(retData, 0, retData.Length);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
    }
}

web.config文件配置

Code
<appSettings>
<add key=\”encryptIV\” value=\”onlinetv\”/>
<add key=\”APP_KEY\” value=\”C5C5AF0C419445C16D214638358AB0C9FA7F36B1DEAEDF8D\”/>

</appSettings>

注意：APP_KEY 设置24位

调用

Code
/// <summary>
        ///  加密
        /// </summary>
        /// <param name=\”str\”></param>
        /// <returns></returns>
        public static string EncryptString(string str)
        {
            TripleDES l = new TripleDES();
            return l.EncryptionStringData(str);
        }
        /// <summary>
        ///  解密
        /// </summary>
        /// <param name=\”str\”></param>
        /// <returns></returns>
        public static string DecrypString(string str)
        {
            TripleDES l = new TripleDES();
            return l.DecryptionStringdata(str);
        }