public static byte[] DecryptData(String data)
{
byte[] data2 = GtsSessionBase.FromUrlSafeBase64String(data);
if (data2.Length < 12)
{
throw new FormatException("Data must contain at least 12 bytes.");
}
int checksum = BitConverter.ToInt32(data2, 0);
checksum = IPAddress.NetworkToHostOrder(checksum); // endian flip
//checksum ^= 0x2db842b2;
return(data2);
}
protected void btnDecode_Click(object sender, EventArgs e)
{
byte[] data = null;
phDecoded.Visible = false;
phChecksum.Visible = false;
try
{
data = GtsSession4.DecryptData(txtData.Text);
litGeneration.Text = "4";
}
catch (FormatException)
{
}
if (data == null)
{
try
{
data = GtsSession5.DecryptData(txtData.Text);
litGeneration.Text = "5";
}
catch (FormatException)
{
}
}
if (data == null)
{
try
{
data = GamestatsSessionPlat.DecryptData(txtData.Text);
litGeneration.Text = "Platinum";
}
catch (FormatException)
{
}
}
if (data == null)
{
try
{
data = DecryptData(txtData.Text);
int checkedsum = 0;
foreach (byte b in data)
{
checkedsum += b;
}
litGeneration.Text = "Unknown (raw)";
litChecksum.Text = checkedsum.ToString();
phChecksum.Visible = true;
}
catch (FormatException)
{
}
}
if (data == null)
{
try
{
data = GtsSessionBase.FromUrlSafeBase64String(txtData.Text);
litGeneration.Text = "Unknown (are you sure this is gamestats data?)";
litChecksum.Text = "";
phChecksum.Visible = false;
}
catch (FormatException)
{
}
}
if (data == null)
{
litMessage.Text = "<p class=\"errorMessage\">Data is not formatted correctly.</p>";
}
else
{
litDecoded.Text = RenderHex(data.ToHexStringLower());
}
phDecoded.Visible = true;
}