DES加密解决算法-白红宇

DES加密解决算法

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发布时间：2019-06-09

本文共 2197 字，大约阅读时间需要 7 分钟。

　　　　///         /// DES加密算法        /// sKey为8位或16位        /// 
        /// 需要加密的字符串        /// 密钥        /// 
             public static string DesEncryptStr(string pToEncrypt, string sKey)        {            StringBuilder ret = new StringBuilder();                             DESCryptoServiceProvider des = new DESCryptoServiceProvider();                byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);                des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);                des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);                MemoryStream ms = new MemoryStream();                CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);                cs.Write(inputByteArray, 0, inputByteArray.Length);                cs.FlushFinalBlock();                foreach (byte b in ms.ToArray())                {                    ret.AppendFormat("{0:X2}", b);                }                ret.ToString();                         return ret.ToString();            //return a;        } ///         /// DES解密算法        /// sKey为8位或16位        /// 
        /// 需要解密的字符串        /// 密钥        /// 
             public static string DesDecryptStr(string pToDecrypt, string sKey)        {            MemoryStream ms = new MemoryStream();                             DESCryptoServiceProvider des = new DESCryptoServiceProvider();                byte[] inputByteArray = new byte[pToDecrypt.Length / 2];                for (int x = 0; x < pToDecrypt.Length / 2; x++)                {                    int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));                    inputByteArray[x] = (byte)i;                }                des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);                des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);                CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);                cs.Write(inputByteArray, 0, inputByteArray.Length);                cs.FlushFinalBlock();                StringBuilder ret = new StringBuilder();                       return System.Text.Encoding.Default.GetString(ms.ToArray());        }