DES加密解密类

/// <summary>
    /// DES加密/解密类。
    /// </summary>
    public class HXEncrypt
    {
        public HXEncrypt()
        {
        }

        #region DES加密


        #region ========加密========

        /// <summary>
        /// 加密
        /// </summary>
        /// <param name="Text"></param>
        /// <returns></returns>
        public static string Encrypt(string Text)
        {
            return Encrypt(Text, "bone");
        }
        /// <summary> 
        /// 加密数据 
        /// </summary> 
        /// <param name="Text"></param> 
        /// <param name="sKey"></param> 
        /// <returns></returns> 
        public static string Encrypt(string Text, string sKey)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] inputByteArray;
            inputByteArray = Encoding.Default.GetBytes(Text);
            des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
            des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
            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);
            }
            return ret.ToString();
        }

        #endregion

        #region ========解密========


        /// <summary>
        /// 解密
        /// </summary>
        /// <param name="Text"></param>
        /// <returns></returns>
        public static string Decrypt(string Text)
        {
            return Decrypt(Text, "bone");
        }
        /// <summary> 
        /// 解密数据 
        /// </summary> 
        /// <param name="Text"></param> 
        /// <param name="sKey"></param> 
        /// <returns></returns> 
        public static string Decrypt(string Text, string sKey)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            int len;
            len = Text.Length / 2;
            byte[] inputByteArray = new byte[len];
            int x, i;
            for (x = 0; x < len; x++)
            {
                i = Convert.ToInt32(Text.Substring(x * 2, 2), 16);
                inputByteArray[x] = (byte)i;
            }
            des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
            des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8));
            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();
            return Encoding.Default.GetString(ms.ToArray());
        }

        #endregion

        #endregion

        #region RSA非对称加密


        /// <summary> 
        /// 生成公钥,私钥对
        /// </summary> 
        public static string[] GenerateKeys()
        {
            string[] sKeys = new String[2];
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            sKeys[0] = rsa.ToXmlString(true);//私钥
            sKeys[1] = rsa.ToXmlString(false);//公钥
            return sKeys;
        }

        /// <summary> 
        /// RSA 加密
        /// </summary> 
        /// <param name="sSource" >明文</param> 
        /// <param name="sPublicKey" >公钥</param> 
        public static string EncryptString(string sSource, string sPublicKey)
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            string plaintext = sSource;
            rsa.FromXmlString(sPublicKey);
            byte[] cipherbytes;
            byte[] byteEn = rsa.Encrypt(Encoding.UTF8.GetBytes("a"), false);
            cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(plaintext), false);

            StringBuilder sbString = new StringBuilder();
            for (int i = 0; i < cipherbytes.Length; i++)
            {
                sbString.Append(cipherbytes[i] + ",");
            }
            return sbString.ToString();
        }


        /// <summary> 
        /// RSA 解密
        /// </summary> 
        /// <param name="sSource">密文</param> 
        /// <param name="sPrivateKey">私钥</param> 
        public static string DecryptString(String sSource, string sPrivateKey)
        {
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            rsa.FromXmlString(sPrivateKey);
            byte[] byteEn = rsa.Encrypt(Encoding.UTF8.GetBytes("a"), false);
            string[] sBytes = sSource.Split(',');

            for (int j = 0; j < sBytes.Length; j++)
            {
                if (sBytes[j] != "")
                {
                    byteEn[j] = Byte.Parse(sBytes[j]);
                }
            }
            byte[] plaintbytes = rsa.Decrypt(byteEn, false);
            return Encoding.UTF8.GetString(plaintbytes);
        }

        #endregion
    }