3DES 加密与解密

     /// <summary>
     /// C#/PHP/JSP 3DES 加密与解密（只支持UTF-8编码）
     /// </summary>
     public class Crypto3DES
     {
         /// <summary>
         /// 默认密钥
         /// </summary>
         private string Keys;
        /// <summary>
         /// 密钥与加密字符串不足8字符时的填充字符
         /// </summary>
         private char paddingChar = ' ';
        /// <summary>
         /// 实例化 Crypto3DES 类
         /// </summary>
         /// <param name="key">密钥</param>
         public Crypto3DES(string key)
         {
             this.Keys = key;
         }
        /// <summary>
         /// 获取密钥，不足8字符的补满8字符，超过8字符的截取前8字符
         /// </summary>
         /// <param name="key">密钥</param>
         /// <returns></returns>
         private string GetKeyCode(string key)
         {
             if (key.Length > 8)
                 return key.Substring(0, 8);
             else
                 return key.PadRight(8, paddingChar);
         }
        /// <summary>
         /// 获取加密字符串，不足8字符的补满8字符
         /// </summary>
         /// <param name="strString">The STR string.</param>
         /// <returns></returns>
         private string GetString(string strString)
         {
             if (strString.Length < 8)
                 return strString.PadRight(8, paddingChar);
             return strString;
         }
        /// <summary>
         /// 加密
         /// </summary>
         /// <param name="strString">加密字符串</param>
         /// <returns></returns>
         public string Encrypt(string strString)
         {
             try
             {
                 strString = this.GetString(strString);
                 DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
                 DES.Key = Encoding.UTF8.GetBytes(this.GetKeyCode(this.Keys));
                 DES.Mode = CipherMode.ECB;
                 DES.Padding = PaddingMode.Zeros;
                 ICryptoTransform DESEncrypt = DES.CreateEncryptor();
                 byte[] Buffer = Encoding.UTF8.GetBytes(strString);
                 return Convert.ToBase64String(DESEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length));
             }
             catch (Exception ex) { return ex.Message; }
         }
        /// <summary>
         /// 解密
         /// </summary>
         /// <param name="strString">解密字符串</param>
         /// <returns></returns>
         public string Decrypt(string strString)
         {
             try
             {
                 DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
                 DES.Key = Encoding.UTF8.GetBytes(this.GetKeyCode(this.Keys));
                 DES.Mode = CipherMode.ECB;
                 DES.Padding = PaddingMode.Zeros;
                 ICryptoTransform DESDecrypt = DES.CreateDecryptor();
                 byte[] Buffer = Convert.FromBase64String(strString);
                 return UTF8Encoding.UTF8.GetString(DESDecrypt.TransformFinalBlock(Buffer, 0, Buffer.Length)).Replace("\0", "").Trim();
             }
             catch (Exception ex) { return ex.Message; }
         }
        #region DESEnCode DESDeCode
         /// <summary>
         /// 加密 与Java通用加密
         /// </summary>
         /// <param name="pToEncrypt">需要加密的字符</param>
         /// <param name="cryptKey">密钥，8位的ASCII字符</param>
         /// <returns></returns>
         public string DESEnCode(string pToEncrypt)
         {
             if (string.IsNullOrEmpty(pToEncrypt)) return string.Empty;
            try
             {
                 pToEncrypt = System.Web.HttpContext.Current.Server.UrlEncode(pToEncrypt);
                 string key = this.Keys;
                DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                 byte[] inputByteArray = Encoding.GetEncoding("UTF-8").GetBytes(pToEncrypt);
                 des.Key = ASCIIEncoding.ASCII.GetBytes(key);
                 des.IV = ASCIIEncoding.ASCII.GetBytes(key);
                 System.IO.MemoryStream ms = new System.IO.MemoryStream();
                 CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
                 cs.Write(inputByteArray, 0, inputByteArray.Length);
                 cs.FlushFinalBlock();
                 StringBuilder ret = new StringBuilder();
                 foreach (byte b in ms.ToArray())
                 {
                     ret.AppendFormat("{0:X2}", b);
                 }
                cs.Close();
                 cs.Dispose();
                 ms.Close();
                 ms.Dispose();
                return ret.ToString();
             }
             catch (System.Exception ex)
             {
                 return ex.Message;
             }
        }
         /// <summary> 
         /// 解密数据  与Java通用解密
         /// </summary> 
         /// <param name="pToEncrypt">解密的字符</param>
         /// <param name="cryptKey">密钥，8位的ASCII字符</param>
         /// <returns></returns> 
         public string DESDeCode(string pToEncrypt)
         {
             if (string.IsNullOrEmpty(pToEncrypt)) return string.Empty;
            try
             {
                 DESCryptoServiceProvider des = new DESCryptoServiceProvider();
                int len = pToEncrypt.Length / 2;
                 byte[] inputByteArray = new byte[len];
                 int x, i;
                for (x = 0; x < len; x++)
                 {
                     i = Convert.ToInt32(pToEncrypt.Substring(x * 2, 2), 16);
                     inputByteArray[x] = (byte)i;
                 }
                string key = this.Keys;
                des.Key = ASCIIEncoding.ASCII.GetBytes(key);
                 des.IV = ASCIIEncoding.ASCII.GetBytes(key);
                 System.IO.MemoryStream ms = new System.IO.MemoryStream();
                 CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
                 cs.Write(inputByteArray, 0, inputByteArray.Length);
                 cs.FlushFinalBlock();
                string ret = System.Web.HttpContext.Current.Server.UrlDecode(System.Text.Encoding.Default.GetString(ms.ToArray()));
                cs.Close();
                 cs.Dispose();
                 ms.Close();
                 ms.Dispose();
                return ret;
             }
             catch (System.Exception ex)
             {
                 return ex.Message;
             }
         }
         #endregion
     }