AW.Pay.Core.RSAFromPkcs8.decryptData C# (CSharp) Метод

        public static string decryptData(string resData, string privateKey, string input_charset)
        {
            byte[] DataToDecrypt = Convert.FromBase64String(resData);
            List<byte> result = new List<byte>();

            for (int j = 0; j < DataToDecrypt.Length / 128; j++)
            {
                byte[] buf = new byte[128];
                for (int i = 0; i < 128; i++)
                {
                    buf[i] = DataToDecrypt[i + 128 * j];
                }
                result.AddRange(decrypt(buf, privateKey, input_charset));
            }
            byte[] source = result.ToArray();
            char[] asciiChars = new char[Encoding.GetEncoding(input_charset).GetCharCount(source, 0, source.Length)];
            Encoding.GetEncoding(input_charset).GetChars(source, 0, source.Length, asciiChars, 0);
            return new string(asciiChars);
        }