Minifycode 2023-02-08 Viewed 456 times C#


How to create XOR two strings in c#

In this article you will lear, how to create XOR two with strings in c#. Given two strings as input, return the result of XORing the code-points of one string against the code points of the other.

The idea is to iterate over both the string character by character and if the character is mismatched then add "1" as the character in the answer string otherwise add "0" to the answer string to generate the XOR string.

public static string XOR_Two_String(string CardNumber, string PIN)
        {
            CardNumber = "2222222222222222";
            PIN = "1234";
            string hexPINBlock = (("0" + PIN.Length + PIN).PadRight(16, 'F'));
            string CNumber = CardNumber.Substring(0, CardNumber.Length - 1); // to skip right most check digit
            string hexCardlock = ("0000" + CNumber.Substring(CNumber.Length - 12));
            long hex1 = Convert.ToInt64(hexPINBlock, 16);
            long hex2 = Convert.ToInt64(hexCardlock, 16);
            long result = hex1 ^ hex2;
            string hexResult = result.ToString("X");//041216DDDDDDDDDD

            return hexResult;
        }

How to create XOR two strings in c#
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