PBKDF2加密

password - the password that needs to be hashed. This should be converted
into a char array before passing.

salt- salt value that should append to the password.

iterations- no. of iterations to be done. This value can be used to adjust the speed of the algorithm.

keyLength- This is the required output length of the hashed function.

This function returns a byte array that needs to be converted into a string using a suitable hex encoder.

需要注意的是，加密的结果是字节数组。在存储到数据库的时候，可以转换为十六进制的字符串或者Base64字符串

        [Test]
        public void Pbkdf2Test()
        {

            string saltString = "8291f825-5772-4b3b-a28c-18887099f6d4";
            var array = Encoding.UTF8.GetBytes(saltString);
            GetHexString(array, );
            GetHexString(array, );
            GetHexString(array,);
            GetHexString(array,);

            var rfc2898DeriveBytes = new Rfc2898DeriveBytes("", array, );
            var result2 = rfc2898DeriveBytes.GetBytes();
            Console.WriteLine($"加密结果数组长度{result2.Length}");
            var string2 = Convert.ToBase64String(result2);
            Console.WriteLine(string2);
            Console.WriteLine(string2.Length);
        }

        public void GetHexString(byte[] array, int keyLength)
        {
            var rfc2898DeriveBytes = new Rfc2898DeriveBytes("", array, );
            var result = rfc2898DeriveBytes.GetBytes(keyLength);
            Console.WriteLine($"加密结果数组长度{result.Length}");

            var hexString = ByteArrayToString(result);
            Console.WriteLine(hexString);
            Console.WriteLine("========Split========");
        }

        public static string ByteArrayToString(byte[] ba)
        {
            var hex = new StringBuilder(ba.Length * );
            foreach (var b in ba)
                hex.AppendFormat("{0:x2}", b);
            return hex.ToString();
        }