CFLYFF !!! Hilfe Nötig :) [LuaC]

/*

004222C0  |> /8A0439        /mov     al, byte ptr [ecx+edi]
004222C3  |. |F6D0          |not     al                              
004222C5  |. |34 3D         |xor     al, 3D                         
004222C7  |. |8AD0          |mov     dl, al                          
004222C9  |. |C0E0 04       |shl     al, 4                           
004222CC  |. |C0EA 04       |shr     dl, 4                           
004222CF  |. |0AD0          |or      dl, al                        
004222D1  |. |881439        |mov     byte ptr [ecx+edi], dl          
004222D4  |. |8B46 08       |mov     eax, dword ptr [esi+8]
004222D7  |. |41            |inc     ecx                             
004222D8  |. |3BC8          |cmp     ecx, eax
004222DA  |.^\7C E4         \jl      short 004222C0

*/
void DecryptCFlyff(BYTE* pData,size_t cb)
{
	BYTE byData=0;
	for (size_t i=0;i<cb;i++)
	{
		byData = pData[i];
		byData = ~byData ^ 0x3D;//byEncryptionKey = 0x3D
		pData[i] = ( byData << 4 ) | ( byData >> 4 );
	}
}