/// <summary>
/// Convert a string like '6162636465666768696A6B6C6D6E6F707172737475767778797A' to decimal string like 'abcdefghijklmnopqrstuvwxyz'
/// ONLY ASCII IN THIS FUNCTION
/// </summary>
/// <param name="bufferToManage">String to convert</param>
/// <returns></returns>
public static string ConvertHexadecimalStringToAsciiString(string bufferToManage)
{
if (bufferToManage == null)
{
throw new NolmeArgumentNullException();
}
int Offset = 0;
string ResultBuffer = StringUtility.CreateEmptyString();
byte[] TextBytesArray = new byte [bufferToManage.Length / 2];
for (int i = 0; i < bufferToManage.Length / 2; i++)
{
TextBytesArray [Offset] = (byte)Int32.Parse(bufferToManage.Substring(i * 2, 2), System.Globalization.NumberStyles.HexNumber, CultureInfo.InvariantCulture);
Offset++;
}
char[] AsciiCharacterArray = new char[Encoding.ASCII.GetCharCount(TextBytesArray, 0, TextBytesArray.Length)];
Encoding.ASCII.GetChars(TextBytesArray, 0, TextBytesArray.Length, AsciiCharacterArray, 0);
ResultBuffer = new string(AsciiCharacterArray);
return(ResultBuffer);
}
/// <summary>
/// Fast & very simple crypt to hexa string
/// </summary>
public static string CryptAsciiStringToHexadecimalString(string bufferToManage, byte cryptKey, bool cryptOrDecrypt)
{
if (bufferToManage == null)
{
throw new NolmeArgumentNullException();
}
StringBuilder LocalStringBuilder;
string TemporaryBuffer;
string ResultBuffer = StringUtility.CreateEmptyString();
byte[] TextBytesArray = null;
if (cryptOrDecrypt)
{
TextBytesArray = Encoding.ASCII.GetBytes(bufferToManage);
/*
* foreach (byte a in TextBytesArray)
* {
* byte bCryptedByte = (byte)(a + cryptKey);
* if (bCryptedByte<16)
* ResultBuffer += "0" + bCryptedByte.ToString ("X", CultureInfo.InvariantCulture);
* else
* ResultBuffer += bCryptedByte.ToString ("X", CultureInfo.InvariantCulture);
* }
*/
LocalStringBuilder = new StringBuilder();
foreach (byte a in TextBytesArray)
{
byte bCryptedByte = (byte)(a + cryptKey);
if (bCryptedByte < 16)
{
TemporaryBuffer = "0" + bCryptedByte.ToString("X", CultureInfo.InvariantCulture);
}
else
{
TemporaryBuffer = bCryptedByte.ToString("X", CultureInfo.InvariantCulture);
}
LocalStringBuilder.Append(TemporaryBuffer);
}
ResultBuffer = LocalStringBuilder.ToString();
}
else
{
int Offset = 0;
TextBytesArray = new byte [bufferToManage.Length / 2];
for (int i = 0; i < bufferToManage.Length / 2; i++)
{
TextBytesArray [Offset] = (byte)Int32.Parse(bufferToManage.Substring(i * 2, 2), System.Globalization.NumberStyles.HexNumber, CultureInfo.InvariantCulture);
TextBytesArray [Offset] = (byte)(TextBytesArray [Offset] - cryptKey); // DECRYPT
Offset++;
}
char[] AsciiCharacterArray = new char[Encoding.ASCII.GetCharCount(TextBytesArray, 0, TextBytesArray.Length)];
Encoding.ASCII.GetChars(TextBytesArray, 0, TextBytesArray.Length, AsciiCharacterArray, 0);
ResultBuffer = new string(AsciiCharacterArray);
}
return(ResultBuffer);
}