数据操作DES加密和解密

 #region   数据操作DES加密和解密

      ///   <summary>

      ///   DES加密字符串

      ///   </summary>

      ///   <param name="encryptString">   待加??密??的??字??符??串??   </param>

      ///   <param name="encryptKey">   加??密??密??钥?,要?a求??为a8位?   </param>

      ///   <returns>   加??密??成??功|返???回?加??密??后??的??字??符??串??，??失???败???返???回?源??串??   </returns>

      public   static   string   EncryptDES(   string   encryptString,   string   encryptKey)

    {

          byte [] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

          try

        {

              byte [] rgbKey =   Encoding   .UTF8.GetBytes(encryptKey.Substring(0, 8));

              byte [] rgbIV = Keys;

              byte [] inputByteArray =   Encoding   .UTF8.GetBytes(encryptString);

              DESCryptoServiceProvider   dCSP =   new   DESCryptoServiceProvider ();

              MemoryStream   mStream =   new   MemoryStream ();

              CryptoStream   cStream =   new   CryptoStream (mStream, dCSP.CreateEncryptor(rgbKey, rgbIV),   CryptoStreamMode .Write);

            cStream.Write(inputByteArray, 0, inputByteArray.Length);

            cStream.FlushFinalBlock();

              return   Convert   .ToBase64String(mStream.ToArray());

        }

          catch

        {

              return   encryptString;

        }

    }

 

 

 

      ///   <summary>

      ///   DES解a密??字??符??串??

      ///   </summary>

      ///   <param name="decryptString">   待?y解a密??的??字??符??串??   </param>

      ///   <param name="decryptKey">   解a密??密??钥?,要?a求??为a8位?,和??加??密??密??钥?相??同??   </param>

      ///   <returns>   解a密??成??功|返???回?解a密??后??的??字??符??串??，??失???败???返???源??串??   </returns>

      public   static   string   DecryptDES(   string   decryptString,   string   decryptKey)

    {

          byte [] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

 

          try

        {

              byte [] rgbKey =   Encoding   .UTF8.GetBytes(decryptKey);

              byte [] rgbIV = Keys;

              byte [] inputByteArray =   Convert   .FromBase64String(decryptString);

              DESCryptoServiceProvider   DCSP =   new   DESCryptoServiceProvider ();

              MemoryStream   mStream =   new   MemoryStream ();

              CryptoStream   cStream =   new   CryptoStream (mStream, DCSP.CreateDecryptor(rgbKey, rgbIV),   CryptoStreamMode .Write);

            cStream.Write(inputByteArray, 0, inputByteArray.Length);

            cStream.FlushFinalBlock();

              return   Encoding   .UTF8.GetString(mStream.ToArray());

        }

          catch

        {

              return   decryptString;

        }

    }

 

    #endregion

 

 

 

   ///   <summary>

      ///   DES解a密??字??符??串??

      ///   </summary>

      ///   <param name="decryptString">   待解密的字符串   </param>

      ///   <param name="decryptKey">   解密密钥要求为8位和加密密钥相同 </param>

      ///   <returns>   解a密成功|返回?解a密??后??的??字??符??串??，??失???败???返???源??串??   </returns>

      public   static   string   DecryptDES(   string   decryptString,   string   decryptKey)

    {

          byte [] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

 

          try

        {

              byte [] rgbKey =   Encoding   .UTF8.GetBytes(decryptKey);

              byte [] rgbIV = Keys;

              byte [] inputByteArray =   Convert   .FromBase64String(decryptString);

              DESCryptoServiceProvider   DCSP =   new   DESCryptoServiceProvider ();

              MemoryStream   mStream =   new   MemoryStream ();

              CryptoStream   cStream =   new   CryptoStream (mStream, DCSP.CreateDecryptor(rgbKey, rgbIV),   CryptoStreamMode .Write);

            cStream.Write(inputByteArray, 0, inputByteArray.Length);

            cStream.FlushFinalBlock();

              return   Encoding   .UTF8.GetString(mStream.ToArray());

        }

          catch

        {

              return   decryptString;

        }

    }

 

    #endregion

转载于:https://www.cnblogs.com/BungeeJumping/p/3397300.html