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  • DES加密/解密

    /// <summary>
        /// DES加密/解密类。
        /// </summary>
        public class DESEncrypt
        {
    
            #region ========加密========
    
            /// <summary>
            /// 加密
            /// </summary>
            /// <param name="Text"></param>
            /// <returns></returns>
            public static string Encrypt(string Text)
            {
                return Encrypt(Text, "Www.EasaA.Com");
            }
            /// <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, "Www.EasaA.Com");
            }
            /// <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
    
        }
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  • 原文地址:https://www.cnblogs.com/New-world/p/3166566.html
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